• 1. Normally open type: 常开式 | 常启式
• 2. SPST normally open type: 单刀单掷常开式

• 1.Next, open up a command line terminal and type cd followed by a space and the destination directory of the file you've just downloaded (this is normally going to be ~/Desktop for your desktop.
  接着，打开一个命令行终端，键入cd+空格+你下载的文件的路径（通常是你主文件夹中的~/Desktop）。
  dict.yoduao.com
• 2.Control type: normally closed, normally open, double acting.
  控制形式：标准常闭、常开、双作用。
  dict.yoduao.com
• 3.Options include direct acting and diaphragm type operations in a Normally Open or Normally Closed version.
  可选包括直接作用和隔膜式常开或常闭版本。
  dict.yoduao.com

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