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发明名称
Improvements in or relating to a machine for forming pipes in the ground
摘要
申请公布号
GB837714(A)
申请公布日期
1960.06.15
申请号
GB19570036013
申请日期
1957.11.19
申请人
ALWYN HALLEY CHENEY
发明人
分类号
E02F5/10;F16L1/038
主分类号
E02F5/10
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