常开

• Mechanical pressure switch , 1 nc , no , positive gauge pressure
  机械压力开关， 1个常闭点常开点，正表压
• Pneumatically disk disengaged brake
  气动盘式制动器.常开型
• Wish your family finally happy , healthy body , smile to often open ! thanks
  最后,祝你家庭美满,身体健康,笑口常开
• I ' ve always driven yank cars
  我常开美国人的车
• The " humor in uniform " section
  "笑口常开
• Normally open solenoid valve
  常开式电磁阀
• Open your door to love
  让恋爱之门常开不闭
• 1 : always open , unlocked
  1 ：常开，不锁定
• 1 : always open , unlocked
  1 ：常开，不锁定
• A carbon nanotube - based normal on under - gate field emission display panel
  一种基于纳米碳管的常开型后栅极场致发射显示板