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出典:Wiktionary
junk head (複数形 junk heads)
From junk + -head.
junkhead (複数形 junkheads)
出典:Wikipedia
出典:『Wikipedia』 (2010/10/30 21:16 UTC 版)
A junk head is a form of piston engine cylinder head, where the head is formed by a dummy piston mounted inside the top of the cylinder. In most other engine designs, the cylinder head is mounted on top of the cylinder block. This form has also been termed a "poultice head".
junk head