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发明名称
GUTTERING
摘要
申请公布号
GB1472973(A)
申请公布日期
1977.05.11
申请号
GB19730045307
申请日期
1974.12.20
申请人
HEPWORTH PLASTICS LTD
发明人
分类号
E04D13/068;(IPC1-7):E04D13/04
主分类号
E04D13/068
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代理人
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