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Zhengzhou New Dragon Superhard Materials Co., Ltd.
No.1202,3# building No.13, Jinxiu street,Erqi district ,Zhengzhou,Henan.
+86-371-55177818
info@zzndtech.com
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Methods of drilling boreholes
2019-12-20
Another primary consideration in project planning is the availability of existing water sources and water points. There may be completed dug wells and boreholes already in the area.
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