音标：[,haidrәunju:'mætik] ；

a. 液压气动的
[医] 积水积气的

a. Pertaining to, or depending upon, both liquid and
gaseous substances; as, hydropneumatic apparatus for collecting gases
over water or other liquids.

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841 、埋头铆钉 countersinkheadrivet 842 、埋头锥孔 countersink 843 、埋头螺栓 countersinkheadbolt 844 、埋头螺丝 countersinkheadscrew 845 、埋头钻 countersinkdrill 846 、

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