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What is the shelf life of 3M's filtering facepiece respirators?

3M随弃式呼吸防护口罩的存放长时间?

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In the event of a fire, wear full protective clothing and NIOSH-approved self-contained breathing apparatus with full facepiece operated in the pressure demand or other positive pressure mode.

如果发生火灾,请要求的压力下,穿保护衣职业安全与健康研究所批准的呼吸器械口罩

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CRI在 20208合集

Mask-wearing is now mandatory in all indoor public places.

现在所有室内公共场所都必须佩戴口罩

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VOA Daily Standard 20213合集

Texas is lifting its COVID-19 mask mandate.

德克萨斯州正在解除其新冠口罩令。

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CRI在 20205合集

The donation includes surgical masks, N-95 respirators and safety goggles.

捐赠物品包括医用口罩、N-95防护口罩和护目镜。

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经济学人(汇总)

Wearing a face mask became a badge of political allegiance.

口罩成了一种政治忠诚的象征。

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CNN 10 学生英语 20215合集

If they don't have a mask, we provide a mask for them.

如果没有口罩,我们就给他们提供口罩

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CNN 10 学生英语 20203合集

Keep your mask on at all times.

要一直戴着口罩

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CNN 10 学生英语 201711合集

Kishur works at one of the busiest and most polluted traffic junctions in the city.

柯苏卖口罩的地方,是新德里最繁忙也污染最严重的地方。

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CNN 10 学生英语 202110合集

But then he took his mask off.

但随后他摘下了口罩

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VOA Special 20212合集

And one of the most important precautions, of course, is to wear a face mask.

当然,最重要的预防措施之一就是戴口罩

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小囧上周今夜秀

When we went out, we wore a mask.

当出门的时候 我们会带上口罩

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影视资

I mean, I don't think they're wearing a mask, right?

我的意思是,我不认为他们戴着口罩,对吧?

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科普小杂文

I would recommend wearing mask or a respirator until you get it wet.

我建议佩戴口罩或防毒面罩,直到其潮湿为止。

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CRI在 20206合集

The surgical masks will be distributed first among healthcare providers.

医用口罩将首先分发给医护人员。

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CNN 10 学生英语 20205合集

Masks may be required on some campuses.

有些学校可能要配备口罩

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CNN 10 学生英语 202111合集

The Federal Aviation Administration says most of the problems are disputes over wearing masks.

美国联邦航空管理局称大部分问题是由戴口罩引发的争执。

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CNN 10 学生英语 202111合集

The U.S. government requires airline passengers to do that. Some of them don't want to.

美国政府要求飞机乘客戴口罩,但一部分人不愿意这么做。

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CNN 10 学生英语 20203合集

Together they use about 250,000 protective masks every year.

这些医院每共计使用口罩约25万枚。

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战疫特辑

You'll see people wearing a very colorful masks that they buy downtown.

会看到人们戴着他们在市中心买的五颜六色的口罩

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CNN 10 学生英语 20214合集

We now have almost 70,000 people to potentially use a mask every single day.

我们现在每天有近7万人可能使用口罩

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比尔·盖茨读书论

Distancing and masks and seeing who's coughing, that was all they had.

保持距离、戴口罩还有注意咳嗽的人,他们当时只能做这些。

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