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发明名称
Buffer and draw head
摘要
申请公布号
US1822094(A)
申请公布日期
1931.09.08
申请号
US19290363315
申请日期
1929.05.15
申请人
HOWARD N. EAVENSON & ASSOCIATES, MINING ENGINEERS
发明人
HICKS JOHN R.
分类号
B61G9/02
主分类号
B61G9/02
代理机构
代理人
主权项
地址
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