Finally there are mechanical skimmers - ideal for retrieving heavy oils - which use metal tooth discs, grab buckets and drum separators to remove the oil then pump it into a tank.
最后还有从回收重油方法改进而来的机械分离器，采用金属齿轮盘将油捞起，然后采用分离机将油分离出来放到储罐中。
The combination of a heavy armour skirt the large distance between it and the actual tank hull will pretty much nullify anybody trying to fire HEAT or he directly into your tracks.
沉重的铠甲的组合裙大的距离，并在实际的坦克船体之间会几乎抵消任何人想热化火，或他就直接到你的轨道。
Test results show that the flow regime is good in a head tank with a greater length of the outlet pond and a smaller contract angle, while the sediment deposition is heavy.
试验结果表明，出水池长度较长，收缩角较小的高位井中的水流流态较好，但池内泥沙淤积程度较重。
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