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发明名称
MEANS FOR EXTENDING AND RETRACTING BOOM SECTIONS OF A CRANE
摘要
申请公布号
US3481489(A)
申请公布日期
1969.12.02
申请号
USD3481489
申请日期
1967.12.05
申请人
ROBERT E. STAUFFER
发明人
ROBERT E. STAUFFER
分类号
B66C13/18;B66C23/70;(IPC1-7):B66C23/06;F02B73/00
主分类号
B66C13/18
代理机构
代理人
主权项
地址
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