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发明名称
Rock-piercing blowpipe
摘要
申请公布号
US2794620(A)
申请公布日期
1957.06.04
申请号
US19510211652
申请日期
1951.02.19
申请人
UNION CARBIDE AND CARBON CORPORATION
发明人
ARNOLD CORNELIUS S.;CALAMAN JOSEPH J.;NAPIORSKI CARL A.;JR. DAVID H. FLEMING,
分类号
E21B7/14;F23D11/12;F23D11/24
主分类号
E21B7/14
代理机构
代理人
主权项
地址
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