One widely sought-after brand is 3M. The Minnesota-based company recently announced that it would invest $15 million in a Singapore plant to increase production of its N95 respirators by 70 percent.
一个广受欢迎的品牌叫3M,厂家的总部位于明尼苏达州。公司最近宣布,将投资1500万美元(约合9300万元人民币)在新加坡新建一座工厂,从而把N95防护罩的产量提升70%。
"We definitely are seeing an increase in sales for respiratory protection" for use in China and elsewhere in Asia during hazy conditions, said Nikki McCullough, the technical manager for 3M's personal safety division. The company said the price for its disposable respirators ranges from 30 cents to $6.70.
3M个人安全部门的技术经理尼基·麦卡洛(Nikki McCullough)称,在中国等亚洲国家,由于人们在雾霾天气里要保护呼吸系统,“我们明显发现相关防护产品的销量增加了”。该公司称自己生产的一次性呼吸防护罩的价钱从30美分到6.7美元不等。
The respirators block particles in a number of ways as the airflow encounters layered fibers. But respirators that guard against small particles can make it more challenging to breathe. That is especially true for people with heart or lung problems, said Tze-wai Wong, a research professor at the School of Public Health and Primary Care at the Chinese University of Hong Kong.
随着气流经过层状纤维,呼吸防护罩会以多种方式阻挡颗粒物。不过,能阻挡细颗粒物的呼吸防护罩可能会让呼吸变得更困难。香港中文大学公共卫生及基层医疗学院(School of Public Health and Primary Care at the Chinese University of Hong Kong)的黄子惠(Tze-wai Wong)教授表示,对有心肺问题的人群尤其如此。
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