能自动返回的常闭按钮触点的英文

self-return button with n.c. contact

• 能:    ability; capabilit ...
• 自动:    voluntarily; of on ...
• 返回:    return; go back; r ...
• 的:    4次方是 The fourth po ...
• 常闭:    normal close
• 按钮:    push-button; press ...
• 触点:    contact; contactor