基本解釋螺旋千斤頂同根派生 jack-screw相關(guān)詞英漢例句Each of the four legs contains a simple screw jack with a thrust bearing that is operated telescopically inside of two tubes.四條腿中每個(gè)都裝有一個(gè)簡單的螺旋千斤頂，千斤頂中又有一個(gè)在兩根管道中做伸縮操作的推力軸承。jack-screw更多例句