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发明名称
Protecting device for pipe coverings or the like
摘要
申请公布号
US1820845(A)
申请公布日期
1931.08.25
申请号
US19290408760
申请日期
1929.11.21
申请人
ROYAL PROTECTOR COMPANY
发明人
STERLING ROYAL
分类号
F16L59/12;F16L59/16
主分类号
F16L59/12
代理机构
代理人
主权项
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