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发明名称
MULTISTAGE TYPE OIL-FREE VACUUM PUMP
摘要
申请公布号
JPS6321394(A)
申请公布日期
1988.01.28
申请号
JP19860164608
申请日期
1986.07.15
申请人
HITACHI LTD
发明人
NAGAOKA TAKASHI
分类号
F04D19/04
主分类号
F04D19/04
代理机构
代理人
主权项
地址
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