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发明名称
Gem grinding device
摘要
申请公布号
US2420502(A)
申请公布日期
1947.05.13
申请号
US19430505100
申请日期
1943.10.06
申请人
HILLEL SPIRA JOSEF
发明人
SPIRA JOSEF HILLEL
分类号
B28D5/00
主分类号
B28D5/00
代理机构
代理人
主权项
地址
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