saliva pump ; dental pump
... dental pulp vitality tester 牙髓活力测验器 dental pump 牙泵，排涎器 dental radiography 牙科放射的摄影术 ...
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油泵牙科椅 oil pump dental chair ; dental pump chair
牙科椅油泵 dental chair oil pump
泵式牙膏 Pump toothpaste
水环式真空泵的圆柱形泵壳内安装一个偏心的牙状叶轮。
Water Ring Vacuum pump cylindrical shell to install a pump eccentric impeller-shaped teeth.
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齿轮泵缺点：由于较小的置换容积以及会磨损齿牙，所以只能输送干净的流体；
Disadvantages: the gear teeth due to smaller displacement volume and will wear, so can only transport clean fluid;
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