| 摘要 |
1533512 Composite casting MAHLE GmbH 25 Aug 1977 [1 Sept 1976] 35718/77 Heading B3F [Also in Division F2] A piston for an internal combustion engine comprises an aluminium alloy body 1, and an insert of porous material, the pores being completely filled with the aluminium alloy. The piston may be manufactured by pouring alloy under pressure into a closed mould 1, 8 already containing a sintered insert 3. |
