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The patent of my company's quick-connect spiral drill pipe?
Release time:
2019-01-16
Author:
Source:
Answer: Name: A quick-connect spiral drill pipe for roadway support and anchoring Patent No.: ZL201020551663.X Name: A thrust slag-discharging spiral drill pipe for coal mine tunnel drilling Patent No.: ZL 201320493681.0 Name: A spring positioning pin for plug-in drill pipe connection Patent No.: ZL201320309926.X
Answer:
Name: A Quick-connect Spiral Drill Pipe for Roadway Support and Anchorage
Patent number: ZL201020551663.X
Name: Thrust slag discharge spiral drill pipe for coal mine tunnel drilling
Patent number: ZL 201320493681.0
Name: A spring positioning pin for plug-in drill pipe connection
Patent number: ZL201320309926.X
Key words:
Spiral, one, drill pipe, patent number, name, coal mine, support, quick connection
