After curing, the tire is without bubble and underfeeding and the tread pattern is clear.

固化后的轮胎花纹清晰,无气泡和缺料现象。

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

在点浇口形式的或无也用到另一种形式主。

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

主拉料杆头部的凹槽形成了一个有效的底切，可以用来拉出主或者是下进料设计的二级主。