Posted by Deutz Lover on February 27, 2020 at 10:06:41 from (66.172.80.74):
In Reply to: Dust mask posted by 37 chief on February 27, 2020 at 09:03:24:
Horrible Freight has several types including Niosh N95.
These filter out 95 percent of particles over 0.3 microns. The coronavirus particle is 0.1 to 0.2 microns so it may filter out some, but not all virus particles. According to recent information the virus is spread mostly by contact. The masks keeps people from touching their mouth and nose. Workers wearing N95 repirators at Wouhan hospital did not get coronavirus. At least ten of the workers at the hospital not wearing repirators came down with coronavirus yet those wearing repirators came into patient contact 7.5 times more often. If this information is correct then masks do help.
A red blood cell is about 3 microns by 7 microns. Most bacteria are over 0.3 microns.
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Today's Featured Article - Fasteners: The Nuts and Bolts of Nuts and Bolts - by Curtis Von Fange. The nuts and bolts of nuts and bolts is an interesting and essential piece of knowledge that applies to our older tractors. An improperly torqued capscrew on an engine head or a shear bolt that is too hard on the driving shaft of a bushog can create havoc and make an expensive and uncalled for repair. Let�s examine the purpose and design of these fasteners in order to ensure their proper use. Fasteners are probably one of the aspects of mechanics that is given the least amount of thought.
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