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发明名称
A ROTARY HEAD
摘要
申请公布号
EP0187637(A3)
申请公布日期
1988.04.27
申请号
EP19860100006
申请日期
1986.01.02
申请人
LUEN, LAM MING
发明人
LUEN, LAM MING
分类号
E02D5/76;E21B3/02;E21B7/00;E21B7/20;E21B21/12;(IPC1-7):E21B3/02
主分类号
E02D5/76
代理机构
代理人
主权项
地址
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