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

3M随弃式呼吸防护口罩存放期是多长时间？

The wort holding tank receives the first wort from the various filters batchwise.

麦汁暂存罐从分批操作各个压滤机接收头道麦汁。

Filter out all the dirt before using the water.

在水以前先将其中不清洁东西过滤掉。

A liquid filters through a strainer,into the receptacle beneath.

液体经过过滤器流入下面容器。

Foreign influence began to filter into the country.

外国势渗透进这个国家。

Inside, sunlight filtered dustily through rows of high windows and settled over the empty pews.

里面，阳光从长窗格栅上带着灰尘筛下来落在空空排椅上。”

The solid particles were filtered from the solution.

固体微粒是从溶液中过滤出来。

You can still see the gas or nebulosity in big telescopes and the right filters.

大望远镜和适度滤色镜，你也可以看到那些气体或云状物。

The existing problem in operation of siphonal sand filter and innovation were introduced.

介绍了虹吸式砂滤器在运行过程中出现问题及改造措施。

Water filters through the sandy soil and into the well.

水透过沙土渗透到井里。

Provides a 6dB-per-octave rolloff filter at 115Hz.

提供一个115赫兹时每八度6分贝低频上移滤波器。

The characteristics of filter between no precoat and precoat were compared.

介绍了江苏省内精密过滤器情况,对比了不预涂和预涂过滤器特点。

Sounds of cheering filtered in through the closed window.

欢呼声透过关闭窗户传了进来。

The autoptic results show that the filter plates produced by this technology have good performance.

现场试验表明,该工艺生产过滤板有较好性能。

Includes AC battery recharger, charging stand, pipette holder with safety valve, and filter.

包括交流电池充电器，充电器座，移液器 架（带安全阀，以及过滤器等）。

This metal net filters out the dirt.

这个金属网滤掉污物。

Ends of the tegular filters (10) are cut off crosswise to make the end surfaces respectively form inclined surfaces such that vertical sections of the tegular filters (10) are in a rough trapezoid.

瓦状滤波器(10)端部被斜向切除以端面分别形成斜面，从而瓦状滤波器(10)垂直截面呈大致梯形。

In the third part of the screen the residual water is pressed out of the sludge, at a minimum filter cake thickness, by the pneumatic counterpressure cone at the press discharge.

在屏第三部分，淤泥上残余水份通过压排放反气动锥被压出来，形成最低厚度泥饼状物。

Lauricidin and its preparation with sorbic acid (Lauribic) for preservation of fruits are tested and their antibiotic activity on oranges, pears and apples is determined by round filter paper method.

对月桂酸甘油单酯及其与山梨酸复配物进行了水果保鲜应效果研究，并圆滤纸片法测定了它们对桔、梨和苹果上霉菌抑霉菌活性。

The counterman scooped out Sumatran coffeebeans,ground them,put the grounds in a filter in the cone and poured hot water over them to give me a sample of their product.

柜台服务员勺子舀出少许苏门答腊咖啡豆，磨成粉，倒入滴滤式咖啡壶滤格，浇下热水，冲一杯咖啡供我品尝。