abrasive formation
... 研磨硬度：abrasive hardness 研磨性地层：abrasive formation 研磨性：abrasiveness ...
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适应于软到中硬非研磨性地层。
Suitable for soft to medium hard Non-abrasive formation.
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适应软到中等非研磨性地层。
Suitable for soft to medium non-abrasive formation.
钻头在钻进超研磨性地层时，胎体的磨损非常严重。
The wear of the matrix of a bit is severe when drilling through super abrasion strata.
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