dense phosphate crown 重磷冕牌玻璃

extra-dense barium crown glass 特重钡冕玻璃 ; 特重火石

dense barium crown glass 特重火石

Dense Crown 茂密树冠

dense baryta crown 含钡重冕玻璃

dense barium crown 重钡冕

dense barism crown 含钡重冕牌玻璃

dense phosphate crown glass 重磷冕玻璃