色窝窝免费播放视频在线,最近的中文字幕视频完整,久久天天躁狠狠躁夜夜婷,天天AV天天爽无码中文

In recent years, all kinds of clean water equipment are selling very well in Lanzhou. Although it is not difficult to find such products in the shopping mall, the price of a clean water machine varies from several hundred yuan to thousands of yuan, and the principle of clean water is different. After all, many people have no idea how to choose it. In this regard, the reporter interviewed some people in the industry and the quality supervision department knows that the fresh water machine sold on the market actually has different effects. The planning of household water purifier includes coarse filtration, activated carbon adsorption, ion exchange resin, food-grade PVC ultrafiltration membrane medical pure water equipment and reverse osmosis membrane, etc. Clean water effect has its own merits.

Ms. Hua, who has been working in Lanzhou Mall for many years as a water-using equipment agent for 20 chemical industries, said that before purchasing, citizens must find out what kind of clean water effect they want to reach, and then choose the corresponding products. The first one is a primary filter water purifier, which has a simple plan and can only be used as a rough filter effect. The filtered water needs to be heated and boiled for drinking. The second is multi-stage filter water cleaner, which has two stages of coarse filtration and a group of fine filtration. Food-grade PVC ultrafiltration membrane is often used for fine filtration. The filtered water can be directly drinkable. The third is UF UF nanofiltration membrane water purifier, which is composed of multi-stage pre-filtration and ultrafiltration membranes. It can intercept most bacteria and harmful substances. It is the most commonly used water equipment for food in shopping malls at that time, which has the most filtering effect. It is the general direct drinking water water water equipment, which preserves the mineral trace elements beneficial to human body together. The best effect of clean water is reverse osmosis water purifier. It has three-stage pre-filtration, one-stage reverse osmosis membrane precision filtration and one-stage post-filtration. The filtered water is pure water without bacteria, viruses, heavy metals, pesticides, organic matter, minerals and peculiar odor. It only needs water molecules. Drinking without heating.

Regarding how to choose and purchase water purifiers, Lanzhou Quality Supervision Bureau staff reminded the public that first of all, it is necessary to recognize whether the purchased water purifiers have 3C certification of mandatory norms for household appliances, as well as aquatic products cleaning permits. When purchasing, do not think that the more the filter element number of clean water equipment, the better. The more the filter element, the better. The important thing is the filter material itself. Pay attention to the market claims that the filter element 3-5 years do not need to be replaced, often exaggerated, because the filter element is conventional consumables, need to be replaced on time.

Author: Hangzhou Water Shield Technology Co., Ltd.

Website: http://www.zjhzsd.com/

Key words: pharmaceutical pure water equipment, chemical industry water equipment, food water equipment