They provide oil & lubrication for the pistons inside of the cylinder.

它们给汽缸中的活塞提供油液 和 润滑剂.

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Oil lubrication is commonly used while working.

使用时一般采用有润滑.

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External components for the oil pump pressure lubrication oil lubrication system of forced circulation type.

外部零件润滑为油泵压力供油强制循环式润滑系统.

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Features shape of plum blossom, taste sweet, loquat juice is fine, red bean oil lubrication delicious.

形似梅花, 口味香甜, 枇杷汁多细腻, 豆沙油润味美.

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A newly developed oil lubrication cold - drawing process to produce steel pipes is briefed in the article.

简介了用于冷拔钢管生产的油润滑冷拔法的特点.

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