讨论:NIOSH空气过滤等级
英文描述有错
如果根据英文维基百科:
not resistant to petroleum 改为 not resistant to oil
somewhat resistant to petroleum 改为 resistant to oil
strongly resistant to petroleum 改为 oil-proof
如果根据英文维基百科:
not resistant to petroleum 改为 not resistant to oil
somewhat resistant to petroleum 改为 resistant to oil
strongly resistant to petroleum 改为 oil-proof