启闭试验多达数万次，使用寿命长。
Long service life. Standing the test of ten thousands opening and closing operation.
安装使用前应进行启闭试验，查看是否正常。
Run a test to see if the valve works before installing and using it.
货舱舱口盖密性试验(启闭试验、应急启闭试验)。
Tightness test (opening and closing test, emergency opening and closing test) for cargo hatch cover.
应用推荐