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经营范围
发明名称
SOUND REDUCING DEVICE FOR USE IN ELEVATOR
摘要
申请公布号
GB1481619(A)
申请公布日期
1977.08.03
申请号
GB19740053862
申请日期
1974.12.12
申请人
HITACHI LTD
发明人
分类号
B66B7/00;B66B11/02;(IPC1-7):B66B11/02
主分类号
B66B7/00
代理机构
代理人
主权项
地址
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