Emptying the main ballast tank by compressed air is one of the important control measures for underwater dynamic anti-sinking.
高压气吹除主压载水舱是潜艇水下动力抗沉的重要操纵手段之一。
Emptying the tank too often is inefficient in terms of manpower and can have knock on effects on the operation of other parts of the sludge treatment system.
过于频繁的清理是浪费劳动力，并且可能降低污泥处理系统其他设备的正常运作的效果。
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