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发明名称
SHAFT FREE SCREW AUGER APPARATUS
摘要
申请公布号
JPS59199987(A)
申请公布日期
1984.11.13
申请号
JP19830075497
申请日期
1983.04.27
申请人
HITACHI ZOSEN KK
发明人
YOSHIKAWA TADAO;KURIKUMA YASUHIRO
分类号
E21B17/22
主分类号
E21B17/22
代理机构
代理人
主权项
地址
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