液压千斤顶(又名：油压千斤顶)利用帕斯卡定律制成的利用液体压强传动的机械，种类液压千斤顶很多。
Hydraulic jack (other name: the hydraulic jack) the use liquid intensity of pressure transmission machinery which makes using the Pascal's law, the type hydraulic jack are many.
介绍一种用于双顶置凸轮轴式发动机的采用两级谐波传动的新型进气凸轮轴调相机构。
A new camshaft-phasing mechanism with twin harmonic drives is described and illustrated, which can be adopted to DOHC (double overhead camshaft) engines.
介绍胶带自动封箱机的总体结构，以及工作台、侧面传动机构、顶式传动机构、刀架等部分的功能。
The paper introduces the structure of an automatic adhesive tape sealer, and the function of working platform, side driving device, top driving device and knife rack etc.
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