精品国产一区二区三区四区阿崩-曰韩精品无码一区二区视频-天天狠天天天天透在线-欧美性插b在线视频网站-高潮流白浆潮喷在线播放视频

It is used to put through and cut off the airflow in vacuum pipeline. The valve has locking function, stable rotation and reliable sealing.The suitable medium is pure air and non-corrosive gas.

Applicable scope: 105 ~ 1.3x10-5Pa
Applicable temperature: -25 ~ 80℃ (NBR)
                                        -30 ~ 150℃ (fluororubber)