91巨炮在线丨高h七仙女辣黄h丨午夜a理论片在线播放丨日本欧美一区二区三区高清丨国四虎影2020丨国产欧美国日产在线播放丨欧美巨波霸乳影院丨污污污污污污www网站免费丨少妇淫交裸体视频丨91丨九色丨喷水丨精品国产免费人成电影在线看丨色喜国模李晴超大尺度丨色天堂视频丨欧美色视频在线播放丨岛国4k人妻一区二区三区丨老女人黄色片丨久草最新视频丨欧美成人猛片aaaaaaa丨深夜国产视频丨97精品亚成在人线免视频

一、General Description

KF type pressure gauge switch is a small stop valve or throttle valve, is mainly used to cut off the pressure gauge and oil connections, or adjustment open size, lighten the pressure gauge sharp beating, prevent damage, also as a general small flow cut-off valve or throttle valve. Pressure oil intertace with inner and outer thread connection