这两大进步允许钢网印刷工艺可放入流水线，必要时，元件放置前后。
These two advances allow the stencil printing process to be inserted into the assembly process wherever required, before or after placement of different types of components.
当画一个序列图的时候，放置生命线符号元件，横跨图的顶部。
When drawing a sequence diagram, lifeline notation elements are placed across the top of the diagram.
将电路板放置在焊台上，针对需要焊接的通孔元件管腿，选择合适的喷锡口，启动波峰焊接。
The circuit board is placed in the welding stage, the pins through hole components welding, choose appropriate spray tin, soldering start.
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