English translation for "back-up safety device"

备用安全设备

Similar Words：

"back-up overspeed governor" English translation, "back-up plate" English translation, "back-up position" English translation, "back-up roller" English translation, "back-up rolls" English translation, "back-up sand" English translation, "back-up shot" English translation, "back-up spring" English translation, "back-up strategy" English translation, "back-up tape" English translation