网络 Sapphire scratch-proof sapphire crystal scratch proof sapphire crystal with double AR
Below that sapphire block is a collection of 349 pieces that drive this watch´s slow, steady movement.
在这片蓝宝石镜面表面下349个零件驱动手表缓慢、稳定地运作。
—— 给力词典精选Improvement of Mirror Finishing Technique of Sapphire
蓝宝石镜面加工工艺的改进
—— 给力词典精选Research on the Technology of Sapphire Cutting
蓝宝石镜面加工工艺的研究
—— 给力词典精选