字典網>> 英漢字典>> D開頭詞條>>double contraction的意思 漢英字典double contraction中文翻譯：【機】 雙重收縮double contraction相關詞條：double axial flow blowers double-deck pull rod double arc method double flame furnace double pole double-precision number doublet trigger double stain double-welded lap joint double error detecting code