释义 |
jack-screw 英d'ʒækskr'uː美d'ʒækskr'uː 基本英英例句 螺旋千斤顶¹⁰⁰
名词 jackscrew: screw-operated jackEach of the four legs contains a simple screw jack with a thrust bearing that is operated telescopically inside of two tubes.四条腿中每个都装有一个简单的螺旋千斤顶,千斤顶中又有一个在两根管道中做伸缩操作的推力轴承。 |