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经营范围
发明名称
Rock-piercing blowpipe
摘要
申请公布号
GB766389(A)
申请公布日期
1957.01.23
申请号
GB19540028877
申请日期
1954.10.07
申请人
UNION CARBIDE AND CARBON CORPORATION
发明人
分类号
E21B7/14
主分类号
E21B7/14
代理机构
代理人
主权项
地址
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