| 摘要 |
1,080,934. Electric motors. CRANE CO. April 12, 1965 [Sept. 9, 1964], No. 15516/65. Heading H2A. [Also in Division F1] The subject-matter of this Specification is substantially the same as that described in Specification 1,079,896, but the variable orifice is formed between the back face of the impeller and the adjacent wall of the pump housing. |
