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  • The development history of vacuum pump
    The development history of vacuum pump With the development of vacuum applications, vacuum pumps have been developed for a variety of species, its pumping speed from zero a few liters per second per se...

  • select a vacuum pump, some points to note
    select a vacuum pump, some points to note 1, the pump pressure job satisfaction is probably the ultimate vacuum and vacuum equipment operating pressure requirements. Such as: a vacuum dry vacuum o...

  • The chemical constituents of the vacuum coating machine
    1. The thickness uniformity, which can also be interpreted as roughness, watching it on the scale of the optical thin film is 1/10 of a wavelength as a unit, is about 100 a, vacuum coating uniformity is g...

 
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