hpl board imadziwikanso kuti refractory board, dzina lasayansi ndi thermosetting resin impregnated paper high pressure laminated board, ndi zokongoletsera pamwamba pa zida zomangira zomangira, hpl board ndiye pepala loyambira kudzera pa melamine ndi phenolic resin impregnation process, kudzera pa t. .
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