基本解释[机械工程]固定式球阀英汉例句双语例句The installation 1, Qudiao flange end of the Flange-connection fixed ball valve protective cover on both sides, in the valve fully open state to wash clean.安装1、取掉法兰端两边的保护盖，在阀完全打开的状态下进行冲洗清洁。fixed ball-valve更多例句词组短语短语O -fixed flange ball valve pneumatic 法兰式气动型固定球阀fixed ball-valve更多词组专业释义机械工程固定式球阀