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

形成了一个有
底切,可以用

主流道或者是下进料设计中
二级主流道。
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版
版) And now she hovered over a lilac with yellow spots, while I pulled out a quiet sage-green that had faded into insignificance under the more brilliant colours, but which was nevertheless a good silk in its humble way.
现在她在一匹带有黄色斑点的丁香紫丝绸上犹豫不决,而
则
出了一匹素净的鼠尾草绿丝绸,在那些更加鲜艳的颜色映衬下,这匹绿丝绸已经失色得几乎不起眼了,但它仍然是一匹不惹眼且质地良好的丝绸。