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发明名称
System for raising and lowering large movable structures
摘要
申请公布号
US2932171(A)
申请公布日期
1960.04.12
申请号
US19570694348
申请日期
1957.11.04
申请人
CUTLER-HAMMER, INC.
发明人
RANSON RICHARD R.
分类号
B66C13/26;E04G21/16
主分类号
B66C13/26
代理机构
代理人
主权项
地址
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