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发明名称
IMPROVEMENTS IN OR RELATING TO DROP HAMMERS
摘要
申请公布号
GB1261220(A)
申请公布日期
1972.01.26
申请号
GB19690012814
申请日期
1969.03.11
申请人
THE BRITISH STEEL PILING COMPANY LIMITED
发明人
ROGER MICHAEL ELLIOTT
分类号
B21J7/40;E02D7/10
主分类号
B21J7/40
代理机构
代理人
主权项
地址
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