Applicable to weak base, weak acid, oli, especially resistant to abrasive medium.

适用于弱碱，弱酸，油类，尤其能耐研磨性介质。

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The wear mass loss is high when the abrasive medium has high hardness, multilayer coating shows better wear properties than single-layer coating in the effect of biggish load.

磨料的硬度较高时，涂层的磨损质量损失较大，与单层涂层相比，多层涂层在较高载荷作用下具有较好的抗磨损性能。

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Low compressive strength of soft to medium formations. Such as soft shale, soft limestone, soft sandstone, hard and soft abrasive interbedded medium formation.

低抗压强度的软到中等地层，如中软页岩。中软石灰岩。中软砂岩。和软硬研磨性夹层的中等地层。

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