一、试验情况简介 1974年,我厂根据制冷机行业技术座谈会关于制冷机械1974～1980年主要新品种发展设想,开始收集有关资料和50缸径全封闭压缩机的设计工作。1975年7月,我厂与兄弟单位共同起草的全封闭活塞式制冷压缩机部标准的征求意见稿完成后,为了验证标准中某些条款的 I. Brief Introduction to the Test In 1974, according to the symposium on refrigeration machinery industry about the development plan of major new varieties of refrigeration machinery from 1974 to 1980, our factory started to collect the relevant data and the design work of totally enclosed compressor with 50-bore. July 1975, I plant and fraternal units jointly drafted fully enclosed piston refrigeration compressor department standard draft of the draft is completed, in order to verify some of the provisions of the standard