snail cam 蜗形调整凸轮 I can't bear him; he does everything at a snail's pace. 我真受不了他，他做什么事都磨磨蹭蹭。
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Radial Snail Cam Machining Technology 径向蜗形凸轮的加工技术
N a cam with spiral cross section used for progressive lifting of a lever as the cam revolves 蜗旋凸轮 [mechanical engineering]
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