Blue Color Sapphire Watch Case For Luxury Brand Czochralski method, or CZ method for short. First heating the raw material to the melting point and .....
OEM Designed Sapphire Crystal Watch Case For Customized Movement The Kyropoulos method, referred to as KY, was first proposed by Kyropoulos in 1926 .....
Transparent Sapphire Crystal Watch Case Fixed By Screws The Kyropoulos method, referred to as KY, was first proposed by Kyropoulos in 1926 and used .....