| 摘要 |
1,167,630. Change-speed control. DEVLEIG MACHINE CO. 6 Nov., 1967 [15 Dec., 1966], No. 23744/68. Heading F2D. The subject matter is identical with that of the parent Specification but the claims are directed to the gear shift mechanism and the arrangement permitting preselection of feed and speed settings during a machining operation (see Specification 1,167,629). |
