然后称重（不含料头），并画出图形。
After weight each shot (without the sprue) and draw the graph.
在链式卸船机垂直取料头的设计中，参数选择非常麻烦。
During the design of vertical suction, it is troublesome to choose the parameters.
活塞杆运行时严禁向送料口伸入头手或送料。
Avoid put hands or head into the feed port when the piston rod is running.
采用顶针接料结构(固定冲头)坯球尺寸稳定。
Thimble form in material fetching (fixed punch head) to keep size of rough ball steady.
延长料管和柱塞头的使用寿命。
延长料管和柱塞头的使用寿命。
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