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Question:

control board than the valve and other major accessories of the origin and name

It is best to explain the merits of the next brand

Answer:

Tell the truth, no original import, the national production
These brands have imported, but also have domestic assembly. If they tell you are imported, you can not believe. The main control board is not the same, the proportion of the valve is a brand, the difference is not. Power, advantages: advertising efforts, visibility is high. Disadvantages: high price outrageous, maintenance costs and high attachment prices. If you are going to sell a boiler, you can consider this brand. The other two brands not much to say.
Water purifier by water treatment, boiling method refers to the tap water after drinking, which is an ancient method, widely used in the country. Water boil can kill bacteria, but some chemicals and heavy metals can not be removed, even if its content is very low, so drinking is still unsafe.

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