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      風琴防護罩

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      1, according to the working conditions to choose the special coating surface material
      2, each fold surface has solid PVC sheet support
      3, special sliding vane can avoid noise at high speed
      4, high frequency welding.
      5, connection plate fixation.

       

      At the design stage to estimate the compression of the welding type shield length, refer to the following parameters:
      Standard folding surface has the following height: 15 mm, 20 mm, 30 mm, 35 mm, 40 mm, 45 mm, 50 mm.
      In total clearance between guide and shield must be minimum of 5 mm, up to 10 mm.
      A fold the unfold size is equal to 2 times the height of folding surface minus 10 mm.
      A compressed fold thickness below the average of 4 mm.

      The compression of shield length is equal to:
      Lmin Lmax = maximum elongation length = minimum compression length
      ST = maximum formation - minimum stroke = work schedule
      H = plait scene height W = width of shield
      A = external height

       

      超薄肉色丝袜激情A片,亚洲国产长腿丝袜AV天堂,国产系列丝袜熟女精品视频