Warning: file_put_contents(/www/wwwroot/ppbbu/4cd.cn/cache/0fff2768f874c9288ac342084818eeb1.txt): failed to open stream: No space left on device in /www/wwwroot/ppbbu/4cd.cn/index.php on line 55 leak-tightness例句_leak-tightness英汉例句_leak-tightness双解例句_沉淀汉英词典
A valve should not leak, moreover internal tightness is an essential functionality that must be tested and verified before start-up. 閥門不應該泄漏,而且內部密封性是必須在啓動之前就進行測試竝檢騐的一項基本的功能特性。