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发明名称
HEATING METHOD FOR WATER REGULATING SLUICE GATES
摘要
申请公布号
CA306023(A)
申请公布日期
1930.11.25
申请号
CAD306023
申请日期
申请人
THE DOMINION BRIDGE CO.
发明人
FRED NEWELL
分类号
主分类号
代理机构
代理人
主权项
地址
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