Self-cleaning filter is a kind of using mesh directly to intercept the impurities in the water, purify water, suspended solids, particulate matter, reduce the turbidity, purify water quality, reduce system dirt, bacteria and algae, corrosion, etc, to purify the water quality and protect the system precision equipment of other equipment to work normally.
Place refers back to the real or virtual place from which a product or service can be obtained by way of a consumer. Another name used for place is termed "distribution channel". Promotion may be the manner in which an item will likely be communicated towards the average person. There are four distinct ways in which this might be done- 'point of sale', 'word of mouth', advertising and advertising.
Voice prompt: you can immediately alert operators by voice, such as lighting lighting - to provide lighting for night operation
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