preproduction model

• 试制模型,样机

preproduction model的用法和样例：

例句

1. It analyses the locomotion mechanism, and makes three model machines with different vibration angular.
   分析了该机构的行走机理，制作了振动角不同的三台样机。
2. The results of dynamic simulation show that the virtual prototype model of the planet-cycloid reducer is valid and reliability.
   仿真分析结果表明，提出的摆线针轮减速机虚拟样机建模正确，有较好的可靠性和实用价值。