长期以来,我国一直把口罩作为呼吸防护的一个主要品种,但对口罩防护机理、防护指标和测试设备的研究没有大的进展,与国际上执行的两个主要标准(美国标准和欧洲标准)相比,有较大的差距。在“非典”病毒猖獗和向全国蔓延的时候,才紧急出台一个具有较高指标的国标GB1983-2003《医 For a long time, China has always used masks as a major breed of respiratory protection, but there has been no major progress in research on the protective mechanism, protection indicators, and test equipment for masks, and it has been compared with two major international standards (American and European standards). Than there is a big gap. When the “SARS” virus was rampant and spread throughout the country, only a national standard GB1983-2003 with higher indicators was urgently issued.