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针对中重型机械设备或车辆在运转过程中易吸入空气中的有害飘浮颗粒而使发动机运动部件发生早期磨损现象,唐纳森推出
For medium and heavy machinery and equipment or vehicles in the operation of the process of easy inhalation of harmful particles floating in the air moving parts of the engine early wear and tear phenomenon, Donaldson launched