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maximum admissible concentration
oil.proc.	最高允许浓度
tech.	最大容许浓度; 最大接受浓度; 最大允许浓度
maximum admissible concentration The maximum exposure to a physical or chemical agent allowed in an 8-hour work day to prevent disease or injury
environ.	最大容许浓度 (8小时工作日中为避免致病或伤害而允许的最大可接触的物理或化学药剂量。)