Black Od 127mm Double wall Drill Pipe For Reverse Circulation
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Double wall drill pipe for reverse circulation Product Description: The double-wall drill pipe is a full-hole drilling tool, and the hole wall gap is small, so there is no space condition for the broken rock to collapse, and the double-wall drill pipe has ......
Langfang Baiwei Drill Co., Ltd.
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127mm Reverse Circulation Drill Rod , Double Wall Drill Pipe For Rc Drilling
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...). An annular gap is formed between the inner and outer pipes, which is a channel for pumping flushing medium to the bottom of the hole during hydraulic rock drilling and central sampling drilling. The central hole of the inner pipe is fixed as a whole to...
Glorytek Industry (Beijing) Co., Ltd.
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