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上海市纺织科学院经一年来的研究,完成了由上海市经委下达的SDN-1型防噪声耳塞和简易防尘、防毒口罩的研制任务。目前已建成年产二百万副耳塞的生产线。该耳塞的各项技术指标均达到国家标准GB 5893.1-86规定的要求,并接近八十年代
After a year of research, Shanghai Textile Academy completed the task of developing SDN-1 noise-proof earplugs and simple dust-proof and anti-virus masks developed by Shanghai Economic Commission. Has completed an annual output of two million earplugs production line. The ear plugs of the technical indicators have reached the national standard GB 5893.1-86 provides for the requirements and nearly eighties