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发明名称
APPARATUS FOR MONITORING OPERATION OF DRAWING ENGINE MECHANICAL DEPTH INDICATOR
摘要
申请公布号
PL156535(B1)
申请公布日期
1992.03.31
申请号
PL19860258973
申请日期
1986.04.14
申请人
发明人
分类号
B66B3/02;(IPC1-7):B66B3/02
主分类号
B66B3/02
代理机构
代理人
主权项
地址
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