Usually divided into normally open, normally closed and self-holding three.

通常分为常开型，常闭型和自保持式三种。

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The parameter plane is divided into stable region and self-oscillating region.

将参数平面划分为稳定区和自振区。

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The parameter plane is divided into stable region and self-oscillating region.

将参数平面划分为稳定区和自振区。

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