Control type: normally closed, normally open, double acting.
控制形式：标准常闭、常开、双作用。
Limit switch, directly actuated, spring returned, normally open.
直接启动、弹簧复位、正常闭合的限制开关。
These valves can be normally closed, normally open or universal.
这些阀门可以常闭，常开或普遍。
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。
Limit switch, directly actuated, spring returned, normally open. Right-click for open or held closed.
限制开关，直接启动，弹簧复位，正常情况下为断路。右击断开或保持闭合。
This design has the following functions:1. open and shut the door normally;
本项设计可以实现以下功能：1）正常的车门开与关；
This design has the following functions:1. open and shut the door normally;
本项设计可以实现以下功能：1）正常的车门开与关；
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