词汇	airtight valve
释义	airtight valve 密闭阀
随便看	building engineering project building engineering quality building engineering school building engineering site building engineering subcontracting building engineering suriey building engineering survey building engineering technology building enterprise building enterprises Building entity building entrance building entrance agreement building envelop building envelope building envelope constructions building envelope, enclosure building envelopes building envelope structure building envelope trade-off option building envelops Building enviroment building environment building environmental technology building environment and equipment