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International Standard Category: Tunnelling and tubing equipment

GB/T 13344-2010    Downhole drill hammers and bits
潜孔冲击器和潜孔钻头;
Category No.:73.100.10 Valid Status:superseded
Issued Organization:AQSIQ, SAC Issued Date:2010-12-1
Implemented Date:2011-3-1 Abolished Date:
Superseded Standard.:GB/T 13344-2019 Down-the-hole hammers and bits
Superseded Date:2020-3-1
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