Room is scare in the infinite sky where we dwell 在我们居住的无限天空之中，没有多少隙地。
2.
It is necessary to study the welding machine power supply for endless - rolling . it can assure the working reliability of welding machine , decrease the mechanical and electric fault , prolong apparatus ' s life , reduce cost and increase product quality 它可以保证焊机正常工作，减少机械和电气事故，延长易损件使用寿命，减低工作强度从而实现无间隙地生产钢材，大幅度提高车间的经济效益，降低生产成本，提高钢材质量。
