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本文是根据1950年大连大学季刊中所载‘活塞环’一文修改补充而成的。修改补充的目标,是把理论和实际更进一步的结合起来。原文係由作者执笔,与胡国棟同志合作写出,这次的修改补充工作,经胡同志同意,由作者单独负责。
This article is based on the 1950 edition of Dalian University Quarterly contained in the ’piston ring’ a supplement made of. The goal of changing supplements is to further combine theory with practice. The original text was authored by the author and written in cooperation with Comrade Hu Guodong. The revision and supplement work was written by the author with the sole consent of the author.