... 锤击杆 hammer lever 锤印盘簧 hammer coil 锤式破碎机 n. hammer mill ...
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If you cannot test geothermal heating principle to the construction, and the ground is absolutely not allowed to drill hammer and hammer nails, to prevent the destruction of the heating coil.
如果无法进行地热加温试验原则上不给施工，而且地上绝对不允许电锤打眼和锤钉，防止破坏加热盘管。
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