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发明名称
SCREW ROTOR AND SCREW VACUUM PUMP
摘要
申请公布号
JPH02305393(A)
申请公布日期
1990.12.18
申请号
JP19890124339
申请日期
1989.05.19
申请人
HITACHI LTD
发明人
UCHIDA RIICHI;MORI HIDETOMO;NAYA KOTARO
分类号
F04C18/16;F04C18/08;F04C25/02
主分类号
F04C18/16
代理机构
代理人
主权项
地址
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