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daim ntawv thov

  • Yuav ua li cas PVC ntawv yog tsim?

    Yuav ua li cas PVC ntawv yog tsim?

    Yuav ua li cas los tsim cov ntawv yas?Xws li cov kauj ruam hauv qab no: calendering melted yas khoom los ntawm calenders rau hauv melting yas zaj duab xis daim ntawv nrog predetermined thickness, sai chilling thiab teem lub melting yas ntawv nrog chilling dej, tshem dej los ntawm cov yas zaj duab xis txias, heati ...
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