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经营范围
发明名称
Improvements in or relating to cracking coal tar oils and distillates
摘要
申请公布号
GB439036(A)
申请公布日期
1935.11.29
申请号
GB19340009924
申请日期
1934.03.29
申请人
JOHN EDWARD HACKFORD
发明人
分类号
主分类号
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