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本文通过对西德液压支架的立柱、千斤顶活塞结构的改进前后,从技术、经济上采用评分制方式进行了比较,认为液压支架立柱等活塞结构采用以塑代铜的组合结构,在技术上是可靠的,在经济上是合理的。
This paper compares the technical and economical adoption of the scoring system before and after the improvement of the column and jack piston structure of the hydraulic support in West Germany. It is considered that the piston structure of the hydraulic support column and the like adopts a combined structure of plastic substitution copper and is technically Reliable, economically justified.