1.Back rest system of loom is the main equipment of controlling the warp tension and sheld location.
喷气织机后梁系统是控制经纱张力和梭口位置的重要装置。
2.The ice sheld had remained intact for centuries despite the weather .
尽管天气变化，经历了几个世纪，冰架依然完好无损。
