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One of the most appealing features of electric high-pressure car washers is their user-friendly operation. Most models are lightweight and portable, allowing car owners to wash their vehicles conveniently at home, without the need to visit a car wash. Additionally, many units come equipped with adjustable nozzles that allow users to switch between different spray patterns, depending on the type of cleaning required. For instance, a wide spray may be ideal for rinsing off soap, while a concentrated jet could effectively blast away stubborn mud or tar.
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Основні переваги скрябери включають дистанційне управління, ергономічний дизайн, а також можливість швидкого обслуговування. Водій може залишити автомобіль на миття і спокійно займатися своїми справами, поки профі з очищення забезпечують бездоганний результат. Крім того, на автомийках зі скряберами часто використовують екологічні засоби, які не завдають шкоди навколишньому середовищу.
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2. Pressure Rating The pressure rating of a pressure washer, measured in pounds per square inch (PSI), significantly affects its price. Lower PSI units (around 1,300-1,500 PSI) are ideal for delicate surfaces and cost less, while high-end models (over 3,000 PSI) offer intense cleaning power, suitable for professionals and heavy-duty applications. As expected, higher PSI models come with higher price tags.
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Hydroxypropyl methyl cellulose (HPMC) is a cellulose derivative that was first developed and used in industrial and food applications starting in the 20th century. Its exact origin in terms of discovery and initial development is difficult to attribute to a single individual or organization, as research and development of cellulose derivatives has involved many scientists and companies at different times.
HPMC is produced through a chemical process known as etherification, in which natural cellulose is treated with hydroxypropyl chloride and sodium methoxide. This process alters the chemical structure of cellulose, making it water-soluble and giving it desired properties as a thickener, stabilizer and film-forming agent.
Production and Use over Time:
The use of HPMC in industrial and food applications has grown significantly since the mid-20th century, when researchers began to more fully explore the potential uses of cellulose derivatives. Its ability to act as a thickener, emulsifier and stabilizer has increased its adoption in a variety of industries, including pharmaceuticals, cosmetics and food.

