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发明名称
Substitute for a Roof Slate
摘要
申请公布号
GB1176534(A)
申请公布日期
1970.01.07
申请号
GB19670004042
申请日期
1967.01.26
申请人
DEREK ALLEN
发明人
DEREK ALLEN
分类号
B01J31/24;B01J31/26;E04D1/12;E04D1/18;E04D1/36
主分类号
B01J31/24
代理机构
代理人
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地址
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