汉英词典
Chinese-English Dictionary
MEANING OF 鉛垂線
鉛垂線 (铅垂线)
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把铅锤或其他重锤悬挂于细线上﹐使它自由下垂﹐沿下垂方向的直线叫做"铅垂线"。铅垂线水平面相垂直。
() qiān chuí 线 () xiàn
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