With regard to the intensity of the forehead band, I Division has two recommendations.Recommendation 1, the inner cloth to silica gel, and will not increase the thickness of the product, but must take into account the combination of forehead and head wear.Recommendation 2, the inner cloth to PC material, and E/H/I thickening, increase comfort.Conductive rubber and to the middle material, such as rubber rubberWill be hollow
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