通过设计启动和停止按钮控制程序的计时和运行。
On the crossing, there are start and stop buttons to control the program.
配以电磁阀外壳和计算机控制程序计时器，大河控制装置将是除尘系统的中心部分。
Go together with to control the procedure timer with the electromagnetism valve outer shell and calculator, the big river control equip will be in addition to the center part of the dust system.
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