Pressure test plug can be used to cap open ended pipes, pipe spools and piping systems and remove the need to fit flanges/ blind flanges which is the traditional way to hydro-statically test and eliminates the need for hot work and consequent permits. It's a fast-track, proven high pressure testing system for hydro-testing short or long span pipework or spools. And also, it's a fast-track proven system for hydro-testing in-situ valves or retro-fit valves.
http://www.huancheng-valve.com..../pressure-gauge-acce

The disposable face mask can filter large droplets produced by someone coughing or talking loudly near you, and has a moisture repellent outer layer, but it is less able to filter the tiny aerosol particles that also potentially carry the virus, as it doesn't fit tightly to the face. However, like reusable face coverings, they do help to capture droplets exhaled by you when coughing, sneezing or talking, helping to limit the spread of viral particles.
http://www.hiknowmedical.com/disposable-face-mask/

Ozone free quartz tube is used for making "Ozone free" UV sterilizing lamp. It is transparent and cut surface is slight purple. Doped with Ti, it can prevent radiation of high-density UV rays but generate no ozone. Spectrum transmission at 185 nm is 0 and no ozone generated. UV transmission at 254 nm is more than 90%. The UV sterilizing lamps made by electric melting quartz tube have much longer life than fused quartz tube.
http://www.fudongquartz.com/fu....sed-quartz-tuebs/ozo

It's long-since been known that the packaging of a product will always contribute to whether or not someone decides to buy one product to another. PVC tube allows you to get ahead of competitors with a neat and tidy aesthetic that can be designed and manipulated in accordance to your preferences. Products are likely to look all the more enticing when they have been protected from damage in transit whilst displayed beside other alternatives that haven't.
http://www.clamshellpackages.c....om/plastic-tube/pvc-

The unique feature of solar LiFePo4 battery (lithium iron phosphate battery) is the use of olive crystal structure, crystal is the shape after crystallization, divided into ionic / molecular / atomic / metal crystal, lithium-ion battery ionic crystal is taken from its cathode material in the arrangement of ionic compounds in the shape of the meaning, that is, by the positive and negative ion group in a certain proportion of the crystal formed by ionic bonding.
http://www.caslithiumbatterych....ina.com/lifepo4-batt