并根据零件的精度要求，制订了缸体的加工工艺，确保了试制产品的质量。
Considering the accuracy need of the cylinder, the manufacturing process was worked out and the produce quality was ensured.
文中介绍这种专用电机的主要结构及设计特点，并将试制产品的性能指标与国外样机进行了对比分析。
The main structure and design features of this special purpose motor is introduced in this paper, and is compared with performance targets of prototype.
介绍了Q 2 35—d槽钢的研制开发情况。通过微合金化处理，试制产品达到了生产铁路豪华客车的要求。
The development of the Q235-D channel steel is described. Through the micro alloying processing, the prototype products have met the requirements to manufacture luxurious railway passenger cars.
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