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发明名称
NATURAL-CIRCULATION WATER-TUBE STEAM BOILER
摘要
申请公布号
CA840746(A)
申请公布日期
1970.05.05
申请号
CAD840746
申请日期
申请人
HEINRICH VORKAUF
发明人
HEINRICH VORKAUF
分类号
主分类号
代理机构
代理人
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