So it is necessary to analyze the mechanics behaviour of the locomotive wheel added the retaining ring, so that we can supply the theory proof to the safety usage of the locomotive.
因此，必须对加装扣环后机车轮对的力学行为进行研究，为保证铁路机车运行安全提供理论依据。
2
This paper mainly discusses how to design a high stability current control power supply for laser gyro of double anodes and common cathode in North-Finder based on Ring laser Gyroscope.
论文主要阐述了寻北仪中双阳极共阴极结构的激光陀螺高稳定度稳流电源的实现过程。
3
But within the fifth ring because the supply is in absolute scarcity, which makes the price reduction will not too big.