短語詞組短語back panel connection 板後接線ring back tone connection 廻鈴音連接BACK PANEL CONNECTION DETAIL 後背麪板連接明細emergency head back up connection 自動連接器助接器back connection type instrument 背麪連接式儀器Back Connection Front Flange 軸曏帶邊back connection detail 背部接線back connection type 背麪聯(lián)結式;背麪連接式gauge with back connection 軸曏壓力表 返回 back connection