亚洲国产精品电影,国产精品无码免费专区午夜,一级一级黄片免费看,久久精品一级毛片免费网,东京热一级片,国产真人真事一级毛片,在线看亚洲一区视频,国产一级AV无码免费手机,久久精品女人天堂AV麻

 The fully automatic variable frequency constant pressure water supply pump is a type of fully automatic booster pump that is directly connected in series on the pipeline or installed on the edge of the water tank. It can automatically work and stop according to the water usage situation, and has a series of advantages such as stable pressure, cleanliness, hygiene, small size, low noise, energy saving, environmental protection, adjustable parameters, and simple use. It is an ideal water supply pump for boosting household tap water, villas, small hotels, farmhouses, small-scale water supply projects, and other areas.