The column, is made of casting iron, will take various models of drilling units or tapping units at user's selection.
机器上的圆柱是由铁铸造而成的，使用者可以决定具体用什么样的钻孔攻丝模型。
Reinforce hollow metal units to receive surface - applied hardware, Drilling and tapping for surface - applied finish hardware may be done at project site.
加固中空金属单位需要安装表面应用五金的，其钻孔和定型可以在工程现场实行。
Reinforce hollow metal units to receive surface - applied hardware, Drilling and tapping for surface - applied finish hardware may be done at project site.
加固中空金属单位需要安装表面应用五金的，其钻孔和定型可以在工程现场实行。
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