这篇小结,是四厂一所在多年试验研究的基础上归纳整理的。文中提出的论点大多经过生产实践的考验。本刊在一九七四至一九七五年间,陆续刊登过这些厂、所的经验介绍。凡论点或数据与本文有出入者,均以本文为准。欢迎同志们对此工艺展开讨论,来信或投稿请寄本刊编辑部。 This summary is the result of many years’ experimental research conducted by the four plants. Most of the arguments put forward in this article have been tested by production practices. The publication from 1974 to 1975, one after another published these plants, the experience of introduction. Where the arguments or data and this article are out of this article, whichever is the article. Welcome to discuss the process of comrades, letters or submission, please send editorial department.