Model QZ100K drill was developed by the machinery plant, Changsha Institute of Mining Research, With a China National practical new-type patent.
QZ100K型潜孔钻机由本院机械厂研制，并已获国家实用新型专利。
Model QZ100K drill was developed by the machinery plant, Changsha Institute of Mining Research, With a China National practical new-type patent.
QZ100K型潜孔钻机由本院机械厂研制，并已获国家实用新型专利。
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