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  • valves generally have poor sealing performance. Many buyers and even sellers do not know how to solve them. Now we have five methods to solve the poor sealing performance of valves for reference.(1) Grinding methodFine grinding, eliminating traces, reducing or eliminating sealing gaps, improving the

    2019.08.12

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  • SEFIC wishes everyone a Happy New Year! !! !!

    2020.01.20

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  • The first category is steel or aluminum alloy metal bottles (CNG-1);The second type is composite steel gas cylinders (CNG-2) reinforced with steel or aluminum lined with barrels and impregnated with long-fiber resin.The third type is a composite gas cylinder (CNG-3) reinforced with steel or aluminum

    2019.11.28

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  • The diameter of the tube can be divided into outer diameter (De), inner diameter (D), and nominal diameter (DN).Note: This is neither the outer diameter nor the inner diameter, but the average of the outer diameter and the inner diameter, called the average inner diameter.When the design uses the no

    2019.08.29

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