The lumbar support roll should fit into the curve in your lower back.
腰支持辊应与您下背部曲线相配合。
The pressure which the support roll 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。
They learn to roll over, support their heads, and even sit up while being held.
他们学会翻身、支撑头部,甚至在被抱着的时候坐起来。
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