介绍一种新型手用工具的工作原理及设计方法。

The operating principle and design method of a new manual tool are introduced.

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星期六一早，美国空军的飞机在伏努科沃机场降落，带来了水箱、水泵、手用工具、医疗包以及其它物资。

This morning, U.S. Air Force planes touched down at Vnukovo airport, carrying water tanks, pumps, hand tools and medical kits, among other things.

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介绍一种新型手用工具的工作原理及设计方法。该工具运用了一种新型棘轮换向机构，可提高手工攻丝或拆装螺纹工件的工作效率。

The operating principle and design method of a new manual tool are introduced. An intermittent revolution mechanism is applied to the tool to improve screwing efficiency.

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