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单选题
Water allowed to accumulate in the hydraulic system oil will cause an oxidation process producing by- products which are normally （）.
A
gums, acids, and varnishes
B
removed by cellulose type filters
C
neutralized by oil additives
D
not removed by absorbent filters
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单选题Water allowed to accumulate in the hydraulic system oil will cause an oxidation process producing by- products which are normally （）.A
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