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患者从事干洗衣工作29年,由于用石油系溶剂作干洗剂。根据制造者的说明,石油系溶剂中C_7～C_(15)的直链型饱和碳氢化合物占99%,二甲苯占0.92%,甲苯0.07%。
Patients engaged in dry-cleaning work 29 years, due to the use of petroleum-based solvents for dry cleaning agents. According to the manufacturer’s instructions, 99% of linear saturated hydrocarbons C_7-C_ (15) in petroleum-based solvents, 0.92% of xylene and 0.07% of toluene.