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。

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

点浇口形式的具或无具中也用到另一种形式。

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

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