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The history of the filter
Filtration technology has been used in production in ancient China, and paper made from plant fibers was already available in 200 BC.
2020-07-10
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Definition of filter
The filter is an indispensable device on the conveying medium pipeline.
2020-07-10
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The choice of high-end metal speaker grille
Metal speaker net made of aluminum alloy. As a breakthrough point, starting from the selection of aluminum alloy materials, the metal speaker mesh can already be achieved through the etching process, that is, chemical corrosion.
2020-07-01
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Selection of low-end metal speaker grille
Relatively low-end cold rolled steel metal trumpet mesh. The metal horn grille of cold-rolled steel is widely used in some early BBA models.
2020-06-23
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Two kinds of speaker nets for automotive interiors
At present, there are two kinds of speaker nets for automotive interiors, mainly plastic and metal. Among them, plastic speaker nets account for the vast majority.
2020-06-23
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What are the working principles of etching?
Usually referred to as etching or photochemical etching, it refers to removing the protective film of the area to be etched after exposure to plate making and development, and contacting the chemical solution during etching to achieve the effect of dissolving corrosion and forming irregularities or Hollow molding effect.
2020-06-20
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