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经营范围
发明名称
摘要
申请公布号
SU385825(A1)
申请公布日期
1973.06.14
申请号
SU19711699021
申请日期
1971.09.09
申请人
发明人
分类号
B63H21/22;(IPC1-7):B63H21/22
主分类号
B63H21/22
代理机构
代理人
主权项
地址
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