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| Standard Code | Standard Title | Standard Class | Order |
|---|---|---|---|
| GB/T 6481-2016 |
Hollow hexagonal drill rods with taperd connection for rock drilling 凿岩用锥体连接中空六角形钎杆 |
China National Standards taperd |
 English PDF |
| GB/T 6481-2002 |
Hollow hexagonal drill rods with taperd connection for rock drilling 凿岩用锥体连接中空六角形钎杆 |
China National Standards taperd |
English PDF |
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