口罩的例句（口罩在句子中的用法）

• Q 20 : Can a valved respirator be used for protection from the virus that causes H 1 N 1 influenza? 问20:可以用带呼气阀的呼吸防护口罩防甲型(H1N1)流感病毒 么 ?
• Q 32 : Do any of 3 M's disposable respirators contain fiberglass material? 问32:3M的随弃式呼吸防护口罩材料中是否含有玻璃纤维?
• She wore a surgical mask and rubber gloves while she worked with the samples. 她处理样品的时候戴着手术口罩和橡胶手套。
• Dust masks are graded according to the protection they offer... 防尘口罩根据它们的防护效果分等级。