Crystals can be divided into four categories according to their structural particles and forces: ionic crystals, atomic crystals, molecular crystals and metal crystals.Atomic crystals: common atomic crystals are some simple substances and some compou…
In addition to the aquarium in the supermarket, the underwater restaurant with the theme of marine culture is also quietly emerging. If the aquarium in the supermarket is a precursor to the popularity of marine culture, then the aquarium theme restau…
Water reducer is a special chemical product added to the concrete mixture before pouring, belonging to a kind of concrete admixture.…
Since the beginning of this year, people around the world have felt the pressure of rising prices. Not only the rise in oil prices but also different industries have seen soaring prices. According to the latest data, from August 2021 to the present,…
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