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发明名称
MANUFACTURE OF PYRO-MELLITIC ACID
摘要
申请公布号
CA541128(A)
申请公布日期
1957.05.21
申请号
CAD541128
申请日期
申请人
DE DIRECTIE VAN DE STAATSMIJNEN IN LIMBURG
发明人
JAN J. A. KNOPS
分类号
主分类号
代理机构
代理人
主权项
地址
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