Amazon stone have flash grid melanin, and because it unique double crystal structure cause.

亚马逊石有闪光的格子色斑，是由于它独特唯一的双晶结构引起的。

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Double feed systems work well if the grid voltage and frequency is very stable.

当网格电压和频率很稳定时，双馈系统工作的很好。

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Double feed systems work well if the grid voltage and frequency is very stable.

当网格电压和频率很稳定时，双馈系统工作的很好。

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