The instruments are easy in material choosing, simple in making and low in cost.
该装置具有取材方便，制作简单，造价低等优点。
The test results may be treated as the theoretical rule about material choosing for back wheel hub axle of home car.
试验结果为国产轿车后轮毂轴的材料选用提供理论依据。
The material choosing and coating designing are discussed in this paper. At the same time, several methods for laser reflective film preparation are compared.
分析了高阈值激光反射膜膜层材料的选择及膜系设计，比较了目前制备高阈值激光反射膜的几种常用方法。
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