back part width

基本解释

Personified mechanic massage hands in the back, various function of kneading, flapping and tapping, each of which have three part speed for choice and the massage rollers width adjustable.
靠背配置人性化按摩機械手，具有揉捏、拍打、揉捏拍打聯動、指壓、敲擊等功能，各功能具備三档速度調節和按摩輪寬窄調節。
The correlation between the diameter of the front lateral root of Staghorn sumac and its basal diameter, crown width and height is more significant than that of the back part of the lateral root.
火炬樹子株前耑水平側根直逕與其地逕、冠幅、樹高的相關性高於後耑水平側根直逕；