名词
中文翻译：防滑扣
同义词：
['knob', 'knob', 'knobbed']
例句：
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1.The knurls on the door handle are designed to grip firmly onto your hand.
门把手上的防滑扣设计得能牢固地抓住你的手。
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2. The knob on the door is smooth and easy to turn.
门上的旋钮很光滑，很容易转动。
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3.The knobbed surface of the tool is designed to provide extra grip when in use.
工具的凹凸表面设计用来在使用时提供额外的握持力。