由于这种泵的结构和螺杆间存在的侧间隙，它可以输送非润滑性介质。
Owing to the pump structure and side clearance between screw, it can transport non-lubricative medium.
通风盘式时制动器在两侧有叶片，空气在泵的作用下流动使制动盘冷却。
Vented disc brakes have a set of vanes, between the two sides of the disc, that pumps air through the disc to provide cooling.
对船厂来说，冷却水侧不需要泵、水管、滤器、阀和电控设备等，安装制造费用低；
For ship yard, cooling side no water pumps, ductwork, inlet filters, vlves, electrical equipment and savings are need, less installation cost, Fot the owner, less maintenance.
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