optional channels 中文意思是什麼
optional channels
解釋
可選通道-
Water cooling or optional oil heating / cooling of the rolls where the water or oil flows in spiral channels near the roll surface which gives an extremely efficient cooling / heating of the rolls and the compound being milled
水冷卻或油加熱/冷卻方式，是通過貼近輥表面的螺旋型流道來實現的，保證強力的加熱冷卻效果。
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