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发动机屋脊形燃烧室每缸四气门
auto. pentroof combustion chamberspace; pentroof-shaped combustion chamber; pentroof-shaped combustion space
发动机屋脊形燃烧室
auto. roof-shaped combustion chamber; roof-shaped combustion space
屋脊四斜坡形燃烧室为每缸四气门发动机常用
auto. roof-type combustion chamber