| 摘要 |
1,042,147. Cores. HUMBER Ltd., and A. STEVENS. April 2, 1963 [April 5, 1962], No. 13210/62. Heading B3F. [Also in Division F1] The inlet passage of an I.C. engine cylinderhead is cast around two indestructible cores which meet along a line C-D, Fig. 1 (not shown), and are withdrawable in angled directions B and A. A valve seat insert F is a shrunk or force fit in one of the cavities. |
