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发明名称
NON-LUBRICATED SCREW MACHINE WITH A ROTOR HAVING A TAPER AND VARIED HELICAL ANGLE
摘要
申请公布号
US5064363(A)
申请公布日期
1991.11.12
申请号
US19900493482
申请日期
1990.03.14
申请人
HITACHI, LTD.
发明人
NAGAI, TOSHIAKI
分类号
F04C18/16;F01C1/08
主分类号
F04C18/16
代理机构
代理人
主权项
地址
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