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发明名称
METHOD FOR LAYING PIPELINES,ESPECIALLY IN DIFFICULTLY ACCESSIBLE EXCAVATIONS
摘要
申请公布号
PL264583(A1)
申请公布日期
1988.12.08
申请号
PL19870264583
申请日期
1987.03.12
申请人
发明人
分类号
E02D;E21F;F16L;(IPC1-7):F16L/;E02D/;E21F/
主分类号
E02D
代理机构
代理人
主权项
地址
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