| 摘要 |
1,271,902. Hobs. W. FERD. KLINGELNBERG SOHNE G.m.b.H. 12 June, 1970 [4 July, 1969], No. 28526/70. Heading B3K. In a hob having three starts 1-3, the roughing starts 1, 2 have different swarf-removing steps. The cutting edges of the hob have positive rakes, and the number of starts does not divide into the number of teeth on the wheel to be cut. |
