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经营范围
发明名称
VACUUM PUMPING
摘要
申请公布号
GB1509377(A)
申请公布日期
1978.05.04
申请号
GB19740031862
申请日期
1975.07.18
申请人
WDM LTD
发明人
分类号
G01L21/12;(IPC1-7):G01L21/12
主分类号
G01L21/12
代理机构
代理人
主权项
地址
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