qsd meaning in English

品质系统文件

Qsd series accumulator tractor : it is designed according to human mechanism principles , it possesses advantages of beautiful in appearance , small in volume , no pollution , a wide field of vision , small in turning radius , simple in operation and easy for maintenance
Qsd系列蓄电池牵引车:根据人机学原理设计，具有外型美观、体积小、无污染、无噪声、视野宽阔、转弯半径小、操作简便、维护方便等优点。