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我国六十年代初开始生产圆环链以来,生产有了较快的发展,品种已有七种,产品质量,近几年来有了较大的提高,并已进入国际市场。为了进一步提高产品质量,煤炭部于一九八二年四、五月间组织了圆环链和连接环同行业质量检查评比工作(简称行检)。参加本次行检的单位有研究所、院校和十九个机制、机修生产厂,历时一个多月,是近年来规模最大的一次。本次行检是按MT36—80《矿用高强度圆环链》部颁标准的C级标准进行全面综合
Since the beginning of the production of the circular chain in the early 1960s, our country has had a rapid development of production. There are already seven varieties of products. The quality of our products has been greatly improved in recent years and has entered the international market. In order to further improve the quality of products, the Ministry of Coal Mine organized the quality inspection appraisal work of ring chain and connecting ring in the same industry in April and May of 1982 (referred to as the line inspection). The units participating in this inspection include research institutes, colleges and nineteen mechanisms and mechanical repair manufacturing plants, which took more than a month and are the largest in recent years. The inspection is based on MT36-80 “mine ring ring” ministerial standard C-level comprehensive comprehensive