screw jack
柯林斯詞典
1. N a lifting device utilizing the mechanical advantage of a screw thread, the effort being applied through a bevel drive 千斤頂 (Also called jackscrew, jack)
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<b id="u23yo"></b> 1. N a lifting device utilizing the mechanical advantage of a screw thread, the effort being applied through a bevel drive 千斤頂 (Also called jackscrew, jack)