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The company developed PDF software as an alternative to Adobe Acrobat. [4] In 2015, the company had sold 1 million licenses. In 2018, it introduced the Nitro Productivity and eSigning Suite. [4] As of 2018, Nitro PDF Pro was utilized by over 650,000 businesses. [5] In June 2021, the company acquired PDFPen, a PDF editing app for Mac, iPad, and ...
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Rooftop HVAC unit with view of fresh-air intake vent Ventilation duct with outlet diffuser vent. These are installed throughout a building to move air in or out of rooms. In the middle is a damper to open and close the vent to allow more or less air to enter the space. The control circuit in a household HVAC installation.
A round diffuser in an HVAC system. Diffusers are very common in heating, ventilating, and air-conditioning systems. [3] Diffusers are used in both all-air and air-water HVAC systems, as part of room air distribution subsystems, and serve several purposes:
Fine bubble diffusers have largely replaced coarse bubble diffusers and mechanical aerators in most of the developed world and in much of the developing world. The exception would be in secondary treatment phases, such as activated sludge processing tanks, where 85 to 90 percent of any remaining solid materials (floating on the surface) are ...
An evaporative diffuser is a device that uses a pad, filter, or reeds to diffuse the essential oils. [2] One of the disadvantages of this tool is that the light elements of the essential oils will be circulated around the ceiling first and will only come down at the end of the process.
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Original file (1,458 × 404 pixels, file size: 206 KB, MIME type: application/pdf) This is a file from the Wikimedia Commons . Information from its description page there is shown below.