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。
And so you get the ideal of mechanical philosophy.
这样就产生了机械学哲理。
Ideal bone-repair materials should be of good biocompatibility and high bioactivity. Besides, their mechanical properties should be equivalent to or better than those of natural bone.
理想的骨修复材料，应当具有良好的生物相容性和高的生物活性，其力学性能与天然骨相当或稍优于天然骨。
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