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。
Applicable medium: water, steam, oil, corrosive media.
适用介质：水、水蒸气、油、腐蚀性介质。
Whether the method be applicable to karst medium is still a problem of controversy.
该方法是否对岩溶介质也适用，目前仍是一个争论的问题。
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