精品国产亚洲国产亚洲,久热中文在线观看精品视频,成人三级av黄色按摩,亚洲AV无码乱码国产麻豆

廣州誠敏電子科技有限公司

溫控器/調(diào)節(jié)儀/記錄儀/電流電壓傳感器/功率計(jì)/兆歐表

化工儀器網(wǎng)收藏該商鋪

13

聯(lián)系電話

13609003160

您所在位置:
廣州誠敏電子科技有限公司>>日本依夢達(dá)IMADA>>測壓元件>> LU-200N/eLU-200N
 QQ交談
產(chǎn)品展示

LU-200N/eLU-200N

  • 公司名稱:
  • 參考價(jià):
  • 更新時(shí)間:
  • 所 在 地:
  • 生產(chǎn)地址:
  • 瀏覽次數(shù):
  • 廣州誠敏電子科技有限公司
  • 18元
  • 2015-10-27 14:32:03
  • 廣州市
  • 日本
  • 1802

我要詢價(jià) 具體成交價(jià)以合同協(xié)議為準(zhǔn)

【簡單介紹】

IMADA測力計(jì)用測壓元件:
LU-50N/eLU-50N、LU-100N/eLU-100N、LU-200N/eLU-200N、LU-500N/eLU-500N、LU-1000N/eLU-1000N、LU-2000N/eLU-2000N

【詳細(xì)說明】

LU-200N/eLU-200N測壓元件

測壓元件:

LU-50N、LU-100N、LU-200N、LU-500N、LU-1000N、LU-2000N

eLU-50N、eLU-100N、eLU-200N、eLU-500N、eLU-1000N、eLU-2000N

SW1-100N、SW1-200N、SW1-500N、SW1-1000N、SW1-2000N、SW1-5000N

eSW1-100N、eSW1-200N、eSW1-500N、eSW1-1000N、eSW1-2000N、eSW1-5000N

SW3-10KN、SW3-20KN、eSW3-10KN、eSW3-20KN

LMU-50N、LMU-100N、LMU-200N、LMU-500N

eLMU-50N、eLMU-100N、eLMU-200N、eLMU-500N

ZD1-1000N、ZD1-2000N、ZD1-5000N、ZD1-10KN、ZD1-20KN

eZD1-1000N、eZD1-2000N、eZD1-5000N、eZD1-10KN、eZD1-20KN

DPU-1000N、DPU-2000N、DPU-5000N、DPU-10KN、DPU-20KN

eDPU-1000N、eDPU-2000N、eDPU-5000N、eDPU-10KN、eDPU-20KN

DPU-2N、DPU-5N、DPU-10N、DPU-20N、DPU-50N、DPU-100N、DPU-200N、DPU-500N

eDPU-2N、eDPU-5N、eDPU-10N、eDPU-20N、eDPU-50N、eDPU-100N、eDPU-200N、eDPU-500N

Feature

- Strain gauge type load cell.
- Able to connect your sample with the 2 sides of the load cell.
- For both tension test and compression test.
- Amplifier is necessary to read load values and output them to external equipment.

Specifications forUniversal Load Cell LU series

ModelLU series
CapacityPlease refer the model list
Rated output+/-0.9~1.4mV / V
Nonlinearity0.5%R.O
Hysteresis0.5%R.O
Recommended voltage(allowable applied voltage)2~5V AC or DC(7V AC or DC)
Safe overload rating150%
Working environment(allowable temperature)0~70 degree Celsius(-10~70 degree Celsius)
Temperature influence for 0 degree0.05%/ degree Celsius
Temperature influence for output0.05%/ degree Celsius
CableApprox.3m(with a connector)
DimensionsPlease refer the dimension

Specifications for eZ-Connect series Load Cell

ModeleLU series
CapacityPlease refer the model list
Accuracy+/-1.0%F.S. or less
Safe overload rating150%
Working environment(allowable temperature)0~70 degree Celsius(-10~70 degree Celsius)
CableApprox.3m(with a connector)
DimensionsPlease refer the dimension

Model List of Universal Load Cell LU series

ModeleZ-Connect series modelCapacityDiameter
LU-50NeLU-50N50NM8 P1.25
LU-100NeLU-100N100N
LU-200NeLU-200N200N
LU-500NeLU-500N500N
LU-1000NeLU-1000N1000N
LU-2000NeLU-2000N2000N

 Dimensions

(Unit:mm)

Dimensions for LU series load cell

Feature

-The female screws on both end of sensor make easy mount on equipment.
-Approved for IP67. Waterproof and dust-proof.
-Strang for splashing water.
-Connecting an amplifier is necessary to output force value.
-IP67 is approved. Waterproof and dust-proof.

Specifications  for Waterproof and Dust-proof Load Cell SW series

ModelSW1 seriesSW3 series
CapacityRefer to the model listRefer to the model list
Rated output+/-2mV/V+/-2mV/V
Nonlinearity+/-0.25%R.O+/-0.25%R.O
Allowable voltage10V DC10V DC
Safe overload rating120%120%
Working environment(allowable temperature)-10~50 degree Celsius(-30~50 degree Celsius)-10~50 degree Celsius(-30~50 degree Celsius)
Temperature influence at 0 point0.005%/ degree Celsius0.005%/ degree Celsius
Temperature influence for output0.005%/ degree Celsius0.005%/ degree Celsius
CableApprox.0.5~4m(Curl cord)Approx.5m
DimensionsRefer to the dimensionRefer to the dimension
International ProtectionIP67*IP67*

*Only the sensor parts are approved IP. An amplifier (an indicator) and connecting parts are not approved.

Specifications  for eZ-Connect series Load Cell

ModeleSW1 serieseSW3 series
CapacityPlease refer to the model listPlease refer to the model list
Accuracy+/-0.5%F.S or less+/-0.5%F.S or less
Safe overload rating120%120%
Working environment(allowable temperature)-10~50degree Celsius(-30~50degree Celsius)-10~50degree Celsius(-30~50degree Celsius)
CableApprox.0.5~4m(Curl Cord)Approx.5m
DimensionsRefer to the dimensionRefer to the dimension
International ProtectionIP67*IP67*

*Only the sensor parts are approved IP. An amplifier (an indicator) and connecting parts are not approved.

Model List of Waterproof and Dust-proof Load Cell SW1 series

ModeleZ-Connect series modelCapacityDiameter
SW1-100NeSW1-100N100NM6
SW1-200NeSW1-200N200NM6
SW1-500NeSW1-500N500NM8
SW1-1000NeSW1-1000N1000NM8
SW1-2000NeSW1-2000N2000NM10
SW1-5000NeSW1-5000N5000NM10

Model List of Waterproof and Dust-proof Load Cell SW3 series

ModeleZ-Connect series modelCapacityDiameter
SW3-10kNeSW3-10kN10kNM16
SW3-20kNeSW3-20kN20kNM16

Dimensions

(Unit:mm)

SW series dimension

Feature

- Strain gauge type load cell
- Extra small size: φ18×H25(mm).
- For both tension test and compression test.
- Sensor’s threads are male screws: You can connect samples with them.
- Amplifier is necessary to read load values and output them to external equipment.

Specifications for LMU series Extra Small Load Cell

CapacityPlease refer the model list
Rated output+/-1mV / V+/-10%(20N is 0.75mV/V~1mV/V)
Nonlinearity0.5%R.O
Hysteresis0.5%R.O
Recommended voltage(allowable applied voltage)1~3V AC or DC(5V AC or DC)
Safe overload rating120%R.O
Working environment(allowable temperature)0~50 degree Celsius(-10~60 degree Celsius)
Temperature influence for 0 degree0.005%/ degree Celsius
Temperature influence for output0.01%/ degree Celsius
CableApprox.2m(with a connector)
DimensionsPlease refer the dimension

 Specifications for eZ-Connect series Load Cell

ModeleLMU series
CapacityPlease refer the model list
Accuracy+/-1.0%F.S or less
Safe overload rating120%R.O
Working environment(allowable temperature)0~50 degree Celsius(-10~60 degree Celsius)
CableApprox.2m(with a connector)
DimensionsPlease refer the dimension

Model List of LMU series Extra Small Load Cell

ModeleZ-Connect series modelCapacityDiameter
LMU-50NeLMU-50N50NM5 P0.8
LMU-100NeLMU-100N100N
LMU-200NeLMU-200N200N
LMU-500NeLMU-500N500N

Dimensions

(Unit:mm)Dimensions for LMU series load cells

Feature

- It is available for high capacities between 1000N and 20kN.
- It can be built in a narrow space by the small shape and the light weight.
- The sensor can be screwed with the both ends. The fixation and the installation are easy.
- IP67 is approved. Waterproof and dust-proof.
- Connecting an amplifier is necessary to output the load value.

Specifications for ZD series High Capacity Load Cell

ModelZD series
CapacityPlease refer the model list
Rated output1.5mV/V
Nonlinearity0.25%R.O
Hysteresis-
Recommended voltage(allowable applied voltage)-
Safe overload rating150%
Working environment-20~80 degree Celsius
Temperature influence for 0 degree0.02%/ degree Celsius
Temperature influence for output0.02%/ degree Celsius
CableApprox.3m(with a connector)
DimensionsPlease refer the dimension
International ProtectionsIP67*

*International Protection is approved for the load cell only.  The amplifier (indicator), the connecting part and the connector are not approved.

Specifications for eZ connect series Load Cell

ModeleZD series
CapacityPlease refer the model list
Accuracy+/-0.5%F.S. or less
Safe overload rating150%
Working environment(allowable temperature)-20~80 degree Celsius
CableApprox.3m(with a connector)
DimensionsPlease refer the dimension
International ProtectionsIP67

*International Protection is approved for the load cell only. The amplifier (indicator), the connecting part and the connector are not approved.

Specifications for ZD series High Capacity Load Cell

ModeleZ-Connect series modelCapacityDiameter
ZD1-1000NeZD1-1000N1000NM12P1.75
ZD1-2000NeZD1-2000N2000N
ZD1-5000NeZD1-5000N5000N
ZD1-10kNeZD1-10kN10kN
ZD1-20kNeZD1-20kN20kN

Dimensions

(Unit:mm)

Feature

- Strain gauge type load cell
- High capacity type available in capacity up to 20kN.
- For both tension test and compression test.
- Amplifier is necessary to read load values and output them to external equipment.

Specifications for DPU series High Capacity Load Cell

ModelDPU-1000N~20kN
CapacityPlease refer to the model list.
Rated output2mV/ V±1%
Nonlinearity0.05%R.O.
Hysteresis0.05%R.O.
Recommended voltage(allowable applied voltage)10V DC(18V DC)
Safe overload ratingPlease refer to the model list.
Working environment-10~+70 degree Celsius
( allowable temperature)(-20~+80 degree Celsius)
Temperature influence for 0 degree0.01%/ degree Celsius
Temperature influence for output0.01%/ degree Celsius
WeightApprox. 800g
DPU-10kN:Approx.1.7kg
DPU-20kN:Approx.2.3kg
Cable3m(with a connector)
DimensionRefer to dimensions.

 Specifications for eZ-Connect series Load Cell

ModeleDPU  -1000N~20kN
FeatureFor large force
CapacityPlease refer to the model list.
Accuracy+/-0.2% F.S. or less
Safe overload ratingPlease refer to the model list.
Working environment( allowable temperature)-10~+70 degree Celsius(-20~+80 degree Celsius)
WeightApprox. 800g
DPU-10kN:Approx.1.7kg
DPU-20kN:Approx.2.3kg
Cable3m(with a connector)
DimensionRefer to the dimensions.

 Model List of DPU series High Capacity Load Cell

ModeleZ-Connect series modelCapacitySafe overload ratingThread
DPU  -1000NeDPU-1000N1000N240%M10
DPU-2000NeDPU-2000N2000N120%
DPU-5000NeDPU-5000N5000N
DPU-10kNeDPU-10kN10kN120%N/A*
DPU-20kNeDPU - 20kN20kN

*There is no thread on DPU-10kN and 20kN. Instead of a thread, there is a female screw M18P1.5 depth 22. It is also possible mounting a thread as an option.

Dimensions

(Unit:mm)

Feature

- Strain gauge type force sensor
- Easy to mount on your equipment with screws.
- For both tension and compression.
- Amplifier is necessary to read load values and output them to external equipment.

Specifications for DPU series Load Cell (Force Sensor)

ModelDPU-  2N~500N
CapacityPlease refer to the model list.
Rated output1mV / V±10%(2N, 5N is 0.9~1.25 mV/ V±10%)
Nonlinearity0.12%R.O.
Hysteresis0.12%R.O.
Recommended voltage(allowable applied voltage)5V DC (12V DC)
Safe overload ratingPlease refer to the model list.
Working environment( allowable temperature)0~+50 degree Celsius(-10~+60 degree Celsius)
Temperature influence for 0 degree0.02%/ degree Celsius
Temperature influence for output0.01%/ degree Celsius
WeightApprox. 325g
Cable2m(with a connector)
DimensionRefer to dimensions.

 Specifications for eZ-Connect series Load Cell (Force Sensor)

ModeleDPU-2N~500N
FeatureFor standard force
CapacityPlease refer to the model list.
Accuracy+/-0.2% F.S. or less
Safe overload ratingPlease refer to the model list.
Working environment( allowable temperature)0~+50 degree Celsius(-10~+60 degree Celsius)
WeightApprox. 325g
Cable2m(with a connector)
DimensionRefer to the dimensions.

Model list of DPU series Load Cell (Force Sensor)

ModeleZ-Connect series modelCapacitySafe overload ratingThread
DPU-  2NeDPU-2N2N150%M6
DPU-5NeDPU-5N5N
DPU-10NeDPU-10N10N200%
DPU-20NeDPU-20N20N
DPU-50NeDPU-50N50N
DPU-100NeDPU-100N100N
DPU-200NeDPU-200N200N
DPU-500NeDPU-500N500N

Dimensions

(Unit:mm)

Dimensions for DPU series force sensor

推拉力計(jì)用手動(dòng)測試臺(tái):

SVL-220、SVL-220-S、NLV-220、NLV-220-C、NLV-220-T、NLV-220-C-S、NLV-220-T-S、NLH-220、NLH-220-S、SVH-220、SVH-220-S、KV-11-S、SH-220、SH-220-S、HV-110 、HV-110-S、HV-110-L、HV-110-L-S、HV-220、HV-220-S、HV-220-L、HV-220-L-S、HV-300、HV-300-S、HV-500、HV-500-S、HV-750、HV-750-S

推拉力計(jì)用電動(dòng)測試臺(tái):

MX-110   MX-275   MX-1100   MX2-110  MX2-275  MX2-550   EMX-275

MH2-110   MH-275   MH-750

ZPS-LM系列推拉力計(jì):

ZPS-LM-0.4    ZPS-LM-1    ZPS-LM-4    ZPS-LM-11    ZPS-LM-44    ZPS-LM-110

ZPS-LM-220 ZPS-LM-440    ZPS-LM-1100 ZPS-LM-2200    ZPS-LM-4400

ZPS-DPU系列推拉力計(jì):

ZPS-DPU-0.4   ZPS-DPU-1   ZPS-DPU-4   ZPS-DPU-11   ZPS-DPU-44   ZPS-DPU-110

ZPS-DPU-220 ZPS-DPU-440   ZPS-DPU-1100   ZPS-DPU-2200   ZPS-DPU-4400

ZPH系列推拉力計(jì):

ZPH-440   ZPH-1100

ZP系列推拉力計(jì):

ZP-0.4   ZP-1   ZP-4   ZP-11   ZP-44   ZP-110   ZP-220

Z2S-LM系列推拉力計(jì):

Z2S-LM-1   Z2S-LM-4   Z2S-LM-11   Z2S-LM-44   Z2S-LM-110   Z2S-LM-220

Z2S-LM-440   Z2S-LM-1100 Z2S-LM-2200   Z2S-LM-4400

Z2S-DPU系列推拉力計(jì):

Z2S-DPU-0.4   Z2S-DPU-1   Z2S-DPU-4   Z2S-DPU-11   Z2S-DPU-44   Z2S-DPU-110

Z2S-DPU-220 Z2S-DPU-440   Z2S-DPU-1100   Z2S-DPU-2200   Z2S-DPU-4400

Z2H系列推拉力計(jì):

Z2H-440  Z2H-1100

Z2系列推拉力計(jì):

Z2-0.4   Z2-1   Z2-4   Z2-11   Z2-44   Z2-110   Z2-220

DS2系列推拉力計(jì):

DS2-0.4   DS2-1   DS2-4   DS2-11    DS2-44   DS2-110   DS2-220

ZTS-LM/ZTA-LM系列推拉力計(jì):

ZTS-LM-2   ZTA-LM-2   ZTS-LM-4   ZTA-LM-4   ZTS-LM-11   ZTA-LM-11   ZTS-LM-44   ZTA-LM-44 ZTA-LM-110   ZTS-LM-110   ZTS-LM-220   ZTA-LM-220    ZTA-LM-550   ZTS-LM-550   ZTS-LM-1100 ZTA-LM-1100   ZTS-LM-2200   ZTA-LM-2200 ZTS-LM-4400   ZTA-LM-4400

ZTS-DPU/ZTA-DPU系列推拉力計(jì):

ZTS-DPU-0.4   ZTA-DPU-0.4 ZTS-DPU-1    ZTA-DPU-1 ZTS-DPU-4    ZTA-DPU-4

ZTS-DPU-11    ZTA-DPU-11 ZTS-DPU-44    ZTA-DPU-44 ZTS-DPU-110

ZTA-DPU-110 ZTS-DPU-220    ZTA-DPU-220 ZTS-DPU-550    ZTA-DPU-550

ZTS-DPU-1100 ZTA-DPU-1100 ZTS-DPU-2200    ZTA-DPU-2200 ZTS-DPU-4400    ZTA-DPU-4400

ZTS/ZTA系列推拉力計(jì):

ZTS-0.4  ZTS-1  ZTS-4  ZTS-11  ZTS-44  ZTS-110  ZTS-220  ZTS-550  ZTS-1100

ZTA-0.4  ZTA-1  ZTA-4  ZTA-11  ZTA-44  ZTA-110  ZTA-220  ZTA-550  ZTA-1100

ESH/PSH系列推拉力計(jì):

ESH-200  ESH-300  ESH-400  ESH-500  ESH-100KGF  ESH-200KGF  ESH-300KGF

ESH-1000N ESH-2000N  ESH-3000N

PSH-200  PSH-300  PSH-400  PSH-500  PSH-100KGF  PSH-200KGF  PSH-300KGF

PSH-1000N PSH-2000N  PSH-3000N

FB/FS/PS系列推拉力計(jì):

FB-32OZ   FB-80OZ   FB-2   FB-5   FB-10   FB-20    FB-30   FB-50    FB-100

FB-1KG   FB-2KG   FB-3KG   FB-5KG   FB-10KG   FB-20KG   FB-30KG   FB-50KG

FB-10N   FB-20N   FB-30N   FB-50N   FB-100N   FB-200N   FB-300N   FB-500N

FS-1K、FS-2K、FS-3K、FB-5K、FB-10K、FB-20K、FB-30K、FB-50K

PS-32OZ   PS-80OZ   PS-2   PS-5   PS-10   PS-20   PS-30   PS-50   PS-100

PS-0.5KG   PS-1KG   PS-2KG   PC-3KG   PS-5KG   PS-10KG   PS-20KG   PS-30KG

PS-50KG PS-10N   PS-20N   PS-30N   PS-50N   PS-100N   PS-200N   PS-300N   PS-500N

電動(dòng)測量支架:

MX-500N、MX-500N-S、MX-500N-S-L、MX-500N-E、MX-500N-E-L、MX-1000N、MX-1000N-S、MX-5000N、MX2-500N、MX2-1000N、MX2-2500N、MX2-500N-L、MX2-1000N-L、MX2-2500N-L、EMX-1000N、EMX-1000N-L、MH-1000N、MH-300、MH2-500N

 手動(dòng)式測量支架:

KV-50N、KV-50N-S、MSF-50N、F-S Master-MSL、SVL-1000N、SVH-1000N、HV-500NII、HV-500NII-S、HV-1000N、HV-3000N、HV-3000N-S、HV-1000N-S、SH-1000N、SH-1000N-S、SH-3000N、SH-3000N-S

LU-200N/eLU-200N、

    
留言框
感興趣的產(chǎn)品: *
留言內(nèi)容:
您的姓名: *
您的單位:
聯(lián)系電話: *
微信:
常用郵箱:
詳細(xì)地址:
省份: *
驗(yàn)證碼: * =   請輸入計(jì)算結(jié)果(填寫阿拉伯?dāng)?shù)字),如:三加四=7
      
產(chǎn)品搜索

請輸入產(chǎn)品關(guān)鍵字:

聯(lián)系方式
地址:廣州市天河區(qū)員村二橫路8號全豐商業(yè)大廈903室
郵編:510655
聯(lián)系人:劉輝東
電話:020-37038973
傳真:020-37038509
手機(jī):13609003160
留言:發(fā)送留言
個(gè)性化:www.gzcm17.com
網(wǎng)址:www.gzcm1718.com
商鋪:http://www.muquzhou.cn/st265015/
| 商鋪首頁 | 公司檔案 | 產(chǎn)品展示 | 供應(yīng)信息 | 公司動(dòng)態(tài) | 詢價(jià)留言 | 聯(lián)系我們 | 會(huì)員管理 |
化工儀器網(wǎng) 設(shè)計(jì)制作,未經(jīng)允許翻錄必究.Copyright(C) http://www.muquzhou.cn, All rights reserved.
以上信息由企業(yè)自行提供,信息內(nèi)容的真實(shí)性、準(zhǔn)確性和合法性由相關(guān)企業(yè)負(fù)責(zé),化工儀器網(wǎng)對此不承擔(dān)任何保證責(zé)任。
溫馨提示:為規(guī)避購買風(fēng)險(xiǎn),建議您在購買產(chǎn)品前務(wù)必確認(rèn)供應(yīng)商資質(zhì)及產(chǎn)品質(zhì)量。
二維碼 在線交流

掃一掃訪問手機(jī)站
国产精品成人欧美激情-黄色床上完整版高清无遮挡| 中文字幕日韩精品不卡在线一区-国产tv日韩在线观看视频| 亚洲国产中文欧美一区二区三区-国产精品一区二区视频成人| 国产欧美日本不卡精美视频-日本后入视频在线观看| 99热在线精品免费6-av一区二区在线观看| 久久网址一区二区精品视频-日产国产欧美视频一区精品| 久久精品亚洲无中文东京热-日本妹子内谢视频一区| 国产精品一区二区在线免费-久久精品国产亚洲av热明星| 国产成人精品免费视频大全办公室-亚洲欧美日本综合在线| 国产精品美女在线网址-久草免费福利在线观看视频| 亚洲av高清一区三区三区-久久人妻夜夜做天天爽| 欧美精品啪啪人妻一区二区-嫩草人妻舔舔羞羞一区二区三区| 亚洲欧美激情自拍色图-国产亚洲精品sese在线播放| 国产一区二区三区四区五区麻豆-欧美一级在线视频播放| 中文字幕偷拍亚洲九色-亚洲视频不卡一区二区天堂| 7m视频7m精品视频网站-亚洲综合香蕉视频在线| 少妇人妻无码久久久久久-综合图片亚洲网友自拍| 亚洲产国偷v产偷v自拍性色av-亚洲欧美日韩国产三区| 国产精品久久久精品一区-99久久免费精品国产男女性高好| 国产av剧情护士麻豆-三级国产精品欧美在线观看| 日韩精品人妻系列一区-亚洲女同性一区二区三区| 久久影视av一区二区-人妻激情乱偷一区二区三区| 免费午夜福利视频在线观看-亚洲成人日韩欧美伊人一区| 日韩亚洲欧美综合在线-成人在线网站在线观看| 国产一区二区三区四区五区麻豆-欧美一级在线视频播放| 色噜噜噜噜一区二区三区-欧美最猛黑人做爰视频| 一区二区三区女同性恋-熟妇高潮一区二区高清网络视频| 久久夜色精品亚洲噜国产av-大香蕉伊人猫咪在线观看| 日韩高清在线观看一区二区-美产av在线免费观看| 中文字幕日韩不卡久久-五月天中文字幕啊av| 一区二区三区日本韩国欧美-日本1区2区3区4区在线观看| 欧美黄色三级视频网站-国产九九热视频在线观看| 国产欧美日本一区二区-一区二区三区亚洲在线播放| 国产欧美日本一区二区-一区二区三区亚洲在线播放| 蜜臀一区二区三区精品在线-99久久久精品免费看国产| 一区二区三区国产高清mm-美女张开腿让帅哥桶爽| 97香蕉久久国产在线观看-麻豆黄色广告免费看片| 日本少妇激情一区二区-亚洲自偷自拍熟女另类蜜臀| 亚洲精品一区网站在线观看-黄页视频免费观看网站| 在线免费观看黄片喷水-国产精品白丝网站在线观看| 久久高清超碰av热热久久-国产高清不卡免费视频|