In most four - barrel carburetors, only the primary barrels have idle system.

在大多数四腔化油器内, 只有主腔才设有怠速系统.

辞典例句

A four - barrel smoke grenade launcher is mounted on each side of the turret.

在炮塔每侧安装一具四管烟榴弹发射器.

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Plus, the lid and bottom are joined whit a four - barrel hinge, rahter than the current five - barrel.

另外, 相对于现在多用的五铰链工艺,这款打火机在盖子的上盖与底部的联接采用的是四铰链.

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