GB/T 6481-2002 凿岩用锥体连接中空六角形钎杆
部分标准内容：ICS.77.140.60
中华xxxx国G家标准
GB/T6481—2002
代替GB/T6481-1994
凿岩用锥体连接中空六角形钎杆，Hollow hexagonal drill rods with taperd connection for rock drilling(ISO 723: 1991,Rock drilling equipment-Forged collaredshanks and corresponding chuck bushings for hollow hexagonaldrill steels ;ISO 1718:1991,Rock drilling equipment—-Drillrods with tapered connection for perc...................
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