Экологичная защитная катушка двойная - двухсторонняя резиновая линия - экран горелоустойчивая пылезащита и водонепроницаемость перекрывающая катушка огнеупорного нити

Board opening 16, Board opening 20, Board opening 22, Board opening 25, Board opening 27, Board opening 28, Board opening 30, Board opening 32, Board opening 35, Board opening 38, Board opening 32*40, The plate opening is 35*40 small, The plate opening is 35*40 large, Board opening 42, Board opening 45, Board opening 47, Board opening 50, Board opening 55, Board opening 60, Board opening 63, Board opening 65, Board opening 70, Board opening 80, Board opening 90, Board opening 100, Board opening 110, Board opening 120, Board open hole 130