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发明名称
Apparatus for replacing mains
摘要
申请公布号
US4720211(A)
申请公布日期
1988.01.19
申请号
US19860892322
申请日期
1986.08.04
申请人
BRITISH GAS CORPORATION
发明人
STREATFIELD, ROY;WILSON, FRANCIS D.;ENGLAND, ROGER
分类号
F16L1/024;A01N29/00;A01N61/00;A01N65/00;E21B7/30;F16L1/00;F16L55/16;F16L55/165;(IPC1-7):F16L55/18
主分类号
F16L1/024
代理机构
代理人
主权项
地址
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