錘球(英語:Plumb bob)於建築工程中,在泥作及電梯等工程做為垂直放樣的重物,目前多用尼龍水線綁紮,固定於上一層或最高層樓板,垂直向下延伸至接近施工處最低完成面,作為垂直參考線的依據。

鉛錘

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