The air resistance may be overlooked if the load density is large.
对密度大的货物空气阻力可忽略不计。
Property: scratches resistance, high mechanical, good flatness uniform density.
性能：表面耐磨，机械强度高，平整度高，密度均匀。
It has a low density and has excellent corrosion resistance.
它具有密度低，具有优良的耐腐蚀性。
It has a low density and has excellent corrosion resistance.
它具有密度低，具有优良的耐腐蚀性。
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