Besides, a layer of water-soluble material protection layer also can be adhered on the exterior of the described bentonite granules layer.
此外，还可在所述膨润土颗粒层外再粘附一层水溶性材料保护层。
Besides, a layer of water-soluble material protection layer also can be adhered on the exterior of the described bentonite granules layer.
此外，还可在所述膨润土颗粒层外再粘附一层水溶性材料保护层。
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