根据上文说到的EPDM（三元乙丙橡胶）的resistance（耐受性）good（良好）、poor（不好）,
fair 在这里解释“可以”“尚可”“中等的”“过得去的”.
在化学相容性中一般以“能耐受”,“有限耐受”,“不能耐受”来划分,fair相当于“有限耐受”.
EPDM shows very good water and chemical resistance.Has poor
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