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发明名称
APPARATUS FOR MONITORING AND INDICATING CLOSURE OF GIN TUB FLAP DOORS
摘要
申请公布号
PL140299(B1)
申请公布日期
1987.04.30
申请号
PL19830243982
申请日期
1983.09.29
申请人
发明人
分类号
B66B;B66B17/32;E21F;(IPC1-7):B66B17/32
主分类号
B66B
代理机构
代理人
主权项
地址
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