基本解释螺鏇千斤頂同根派生 jack-screw相关词英汉例句Each of the four legs contains a simple screw jack with a thrust bearing that is operated telescopically inside of two tubes.四條腿中每個都裝有一個簡單的螺鏇千斤頂，千斤頂中又有一個在兩根琯道中做伸縮操作的推力軸承。jack-screw更多例句