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日前各种液压设备,其液压系统所采用的液压油主要有以下两大类:(1)矿物油系,主要成分是由提炼后的石油制品加入各种添加剂而成的,具有润滑性
Recently a variety of hydraulic equipment, the hydraulic system used in hydraulic oil mainly in the following two categories: (1) mineral oil system, the main component is refined petroleum products by adding a variety of additives made with lubricity