设计组甚至提出去掉车门和车身用塑料取代钢材的主张。
The team even asked whether there was a need for doors and whether plastic instead of steel could be used for the bodywork.
它的强度是普通塑料板材的几倍，强度大于钢材和铝材。
The strength is several times than normal plastic plate, steel and aluminum.
经改善钢材质量、采用塑料保持架、改进挡边结构及凸度滚子的应用，可使圆柱滚子轴承的寿命和性能大幅度提高。
By improving steel material quality, adopting plastic cage, improving rib structure and using crowned rollers, the life and performance of cylindrical roller bearing can be largely increased.
应用推荐