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发明名称
Resiliently held coal-cutter picks
摘要
申请公布号
US3174802(A)
申请公布日期
1965.03.23
申请号
US19630286054
申请日期
1963.06.06
申请人
AUSTIN & HOY AND COMPANY LIMITED
发明人
PROCTOR SIDNEY ERNEST
分类号
E21C35/18;E21C35/19
主分类号
E21C35/18
代理机构
代理人
主权项
地址
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