After a mysterious malfunction sends their small plane climbing out of control, a rookie pilot and her four teenage friends find themselves trapped in a deadly showdown with a supernatural force.
The standard emergency lowering switch provides for patient lowering capabilities in the event of a hand controller or control board malfunction.
本标准规定了紧急下降开关降低病人在一只手的控制器或控制电路板故障事件的能力。
3
The widely application of software increasingly change the malfunction mode of control system, so the significance of studying new safety technology becomes very important.