如何測量戒指的圓度?

如果庫存中沒有合適的戒指, 它需要定制. 具體定制時間請聯繫我們的銷售人員. 方法一: Measure the inside diameter of an existing ring Method Two: 1. 測量時, 你可以使用更細的繩子或線 (沒有彈性) and wrap it around the finger

如何測量戒指的圓度? 閱讀更多 »

HPHT and CVD coexist for a long time

The co-development of the two technical routes pushes up the production of cultured diamonds. After years of research and development, there have been a variety of methods to prepare and cultivate diamonds. 現在, there are only two technical routes of commercial high temperature and high-pressure method (高溫高壓) 和化學氣相沉積 (化學氣相沉積). 高溫高壓法 …

HPHT and CVD coexist for a long time 閱讀更多 »