1.A modified form of sprue gate is also used on underfeed moulds and runnerless moulds.

1.在点浇口形的或无流中也用到另一种形主流。

2.The grooved head of the sprue puller creates an effective undercut which is used to pull the sprue, or secondary sprues in underfeed designs.

2.主流拉料的凹槽形成了一个有效的底切，可以用来拉出主流或者是下进料设计中的二级主流。