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发明名称
Improvements in or relating to pick-boxes for chain cutter-picks for coal-cutting and like machines
摘要
申请公布号
GB330055(A)
申请公布日期
1930.06.05
申请号
GB19290011013
申请日期
1929.04.09
申请人
WILLIAM SHEARER GALLOWAY;C-W. ENGINEERING CO. LIMITED
发明人
分类号
E21C35/19
主分类号
E21C35/19
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