... roll center 迁移变化中央 roll hose 卷叠水带 roll 驶向火场 ...
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hose roll 水带卷盘
HOSE CLAMP ROLL 软管夹卷
roll solid during hose building [橡胶] 软管成型加压
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In the peristaltic pump, a plurality of rollers roll to press an elastic hose continuously, so that liquid is transported in accordance with the movement direction of the rollers.
该蠕动泵是 由几个滚轮滚动连续不断地压迫弹性软管，将流体按滚轮运动的方向输送。
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