国产成人在线观看_青青草91视频_日韩一二在线_天天操91_国产精品内射后入合集_四库成人免费视频

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)