The lumbar supportroll should fit into the curve in your lower back.
腰支持辊应与您下背部曲线相配合。
2
The pressure which the supportroll roller is uses pair or a group of roller rolls when produces to come the millstone steel products, causes the metal to produce the plastic deformation tool.
支承辊轧辊是利用一对或一组轧辊滚动时产生的压力来轧碾钢材,使金属产生塑性变形的工具。
3
They learn to roll over, support their heads, and even sit up while being held.