The contacts of this relay can be used for control functions.
继电器的接触点就可以执行控制功能。
Jitter, that is very likely damage degaussed resistance, in the absence of sound may be the relay and control circuit problem.
抖动，说明极有可能是消磁电阻损坏，如果没有响声则可能继电器及其控制电路有问题。
PLC or Relay control with optional operation of manual and semi-auto.
有电脑、继电器两种控制方式，设有手动、半自动两种操作方式。
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