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The weight that drops in a pile driver or steam hammer.
撞键打舂机或汽棰内落下的重物。
youdao
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By using hammer method for pile quality is a high effective.
锤击法在桩基质量检测中是一种行之有效的手段。
youdao
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By using hammer method for pile quality is a high effective.
锤击法在桩基质量检测中是一种行之有效的手段。
youdao