面层外观凹凸不平,材质疏松柔韧,留有90%以上的空间可充填土壤及沙粒。
The surface is uneven and crumbly, so it allows soil or sand be filled in by 90%.
以聚氯乙烯(PVC)为材质的冷却塔塑料淋水填料由于表面凹凸不平和厚薄不匀,无法用标准方法进行检测。
Being rough and uneven in surface and thickness, plastic cooling fillers for cooling tower which are made from polyvinyl chloride (PVC) doesn't examined with standard method.
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