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发明名称
Preformed composite step tread
摘要
申请公布号
US2236465(A)
申请公布日期
1941.03.25
申请号
US19380210805
申请日期
1938.05.31
申请人
CARLSON ARNOLD B
发明人
CARLSON ARNOLD B.
分类号
E04F11/16
主分类号
E04F11/16
代理机构
代理人
主权项
地址
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