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mechanical, hydraulic, or pneumatic lifting device
AI overview
A jack is a mechanical, hydraulic, or pneumatic device used to lift heavy objects off the ground. It matters because it makes it possible to safely raise vehicles, machinery, and other heavy items for maintenance, repair, or other purposes that would be impossible to accomplish by hand.
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- Rangierwagenheber.JPG
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- Commons category
- Lifting jacks
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Article · 中文
千斤頂，又稱鐵人，一種應用螺旋機制來架高重物的工具。有很多型式與種類，有帕斯卡原理的油壓千斤頂、利用螺紋的螺旋千斤頂和利用齒條與齒輪的齒條驅動千斤頂。最常用的是車用千斤頂。常用於修理汽车底盤或替換輪胎時使用。千斤頂通常以其能舉起的最大重量做標示（例如1.5噸）。機械千斤頂採用螺紋來提升重型設備，液壓千斤頂使用液壓動力來提升重型設備。工業千斤頂的額定功率可達數噸。
Abstract from DBpedia / Wikipedia · CC BY-SA