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Some substances can be detected when their concentration is only few milligrams per 1000 tonnes, which is less than a drop in an Olympic swimming pool. Odor threshold value can be expressed as a concentration in water or concentration in air. Two major types of flavor thresholds can be distinguished: the absolute and the difference threshold.
Submeters can measure use of a single panel, or multiple points within a panel system using single-point, multi-point, and branch circuit submeters. [9] The latest [clarification needed] trend in submetering is Automatic Meter Reading, or AMR. This technology is used to get from meter reading to billing by an automated electronic means.
A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces. [1] [2]
A 7-year-old boy accidentally shot and killed his 2-year-old brother inside a truck parked in a California shopping center, authorities said.. On Monday, just before 4 p.m. local time, the boy ...
Olfactory fatigue, also known as odor fatigue, odor habituation, olfactory adaptation, or noseblindness, is the temporary, normal inability to distinguish a particular odor after a prolonged exposure to that airborne compound. [1]
Shares for Super Micro climbed over 20% Monday morning. ... Super Micro reported fourth-quarter revenue of $5.31 billion, a more than 143% increase over the $2.18 billion it reported in the same ...
The U.S. State Department on Monday said the United States joined calls from election observers for a full investigation of all reports of election-related violations in Georgia. State Department ...
In heating, ventilation, and air conditioning (HVAC), testing, adjusting and balancing (TAB) are the three major steps used to achieve proper operation of heating, ventilation, and air conditioning systems. TAB usually refers to commercial building construction and the specialized contractors who employ personnel that perform this service.
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