A self-fastening method is introduced by which a cleat-shaped seed crystal is fixed in the swallow-tailed groove. 本文介绍一种在提拉法中使用的晶种劈形自紧固方法。
But ever finer control of the temperature gradient around the seed is eliminating the telltale imperfections that jewelers could once detect with a magnifying glass. 然而，一种能更精细控制晶种周围温度梯度的方法，正逐渐去除这种遮掩不了的瑕疵。
