开泄
"Open and release"
以上为机器翻译结果，长、整句建议使用 人工翻译 。
PCTH测试阀可实现持开的功能，环空泄压后仍能保持开启状态，使用起来更加方便、灵活。
PCTH tested valve has the function of being open state constantly and that keeping on open after annulus pressure relived out makes it much handy and be liable to be used.
youdao
特制急速放泄阀门，开模下降。
Special rapid release vent valve, mold down.
应用推荐
模块上移
模块下移
不移动