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International Standard Category: Tunnelling and tubing equipment

MT/T 904-2002    Welded drill rod and bit for low-compressive strength rock
焊接结构软岩钻杆与钻头 ;
Category No.:73.100.10 Valid Status:valid
Issued Organization:SETC Issued Date:2002-4-8
Implemented Date:2002-9-1 Abolished Date:
Superseded Standard.: Superseded Date:
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