型热电偶，非接触型继电器开关，极限装置。
当感应器显示参数超出可调节的预定极限，盖装置将一个或多个继电器通电或断电。
When sensing indi- cates a parameter is outside adjustable predetermined limits, the unit energizes or deenergizes one or more relays.
当感应器显示参数超出可调节的预定极限，盖装置将一个或多个继电器通电或断电。
When sensing indi- cates a parameter is outside adjustable predetermined limits, the unit energizes or deenergizes one or more relays.
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