underfeed

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

在点浇口的模具或无流道模具中也用到另一种流道。

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

流道头部的凹槽成了一个有效的底切，可以用来出流道或者是下进设计中的二级流道。