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  • Types and use of ball bearings

    Types and use of ball bearings

    Ball-bearing is a kind of rolling bearing. The ball is installed between the inner steel ring and the outer steel ring, which can bear the coaxiality. Also called ball bearings....
  • The properties and use of tungsten disulfide

    The properties and use of tungsten disulfide

    What is sulfide? In inorganic chemistry, sulfide refers to a type of compound formed by a metal or non-metal with strong electropositiveness and sulfur. Most metal sulfides can be regarded as salts of hydrosulfuric acid. Since hydrosulfuric acid is a wea...
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