Seen here is an up-close shot of the mold used to make a three-stud LEGO brick.
现在你所看到的是一个近距离拍摄的用于制造3螺栓的乐高零件的模具。
This type of mold is widely used because it is? Comparatively easy to construct and it controls thickness and density within close limit.
这种类型的模具得到了广泛应用，原因在于其容易铸造，而且厚度和强度的误差极小。
The study shows that the mold friction has a close relationship with the strand quantities, operation and the life of quick mould change equipment.
研究表明，结晶器摩擦力与铸坯质量、生产操作以及结晶器振动台的寿命等有很大的关系。
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