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发明名称
DEVICE FOR BALLASTING PIPELINE IN TRENCH
摘要
申请公布号
SU1265433(A2)
申请公布日期
1986.10.23
申请号
SU19853889991
申请日期
1985.04.26
申请人
VNI PI PO TRANSPORTU PRIRODNOGO GAZA
发明人
BREKHMAN MIKHAIL I,SU
分类号
F16L1/00
主分类号
F16L1/00
代理机构
代理人
主权项
地址
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