What is the implementation standard of geological drill pipe?

Release time:

2018-02-26

Author:

Source:

A: the People's Republic of China Ministry of Coal Industry Standard MT/T521-2006

Click to download:Tunnel regular drill pipe for coal mine drilling -- Coal industry standard

Key words:

What is the material of 42CRMO and 42CRMOA and what is the difference?

Another name for geological drill pipe?

What is the material of 42CRMO and 42CRMOA and what is the difference?

Another name for geological drill pipe?

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