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发明名称
Roller drive chain
摘要
申请公布号
US2638790(A)
申请公布日期
1953.05.19
申请号
US19500191454
申请日期
1950.10.21
申请人
PERRON EMIL E
发明人
PERRON EMIL E.
分类号
F16G13/06
主分类号
F16G13/06
代理机构
代理人
主权项
地址
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