HPHT gradient temperature method is an effective technique to grow gem diamonds.
高压温度梯度法是一种有效的合成宝石级金刚石单晶的方法。
Large synthetic diamond was grown by temperature gradient method (TGM) under HPHT.
用高温高压温度梯度法作为实验手段来生长优质宝石级金刚石单晶。
The more efficient produce technology of gem-grade diamond is HPHT temperature difference method which was created by American ge Corporation.
宝石级金刚石的培育技术比较有效的方法是美国GE公司首创的hpht温差法。
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