作者: Douglas R. Kralik
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摘要: An inflatable padded game ball, such as a football, having an outer carcass, padding inside the liner and bladder liner. The is so dimensioned relative to carcass that establishes final dimensions of ball when inflated within it. air impervious formed multiple layers increase strength durability. also including inner woven fabric reinforcement plastic sheet middle layer for establishing shape ball. method constructing includes mold smaller than which molds When removed from expand size