The technical maintenance to be carried out every 240 working hours of the tractor. 1. Check the radial clearance of the connecting rod bearing and the crankshaft bearing, and the axial clearance of the crankshaft; 2. Clean the piston and piston ring, measure the cylinder wear, and replace the new one if necessary; 3, check, adjust the engine regulator, check, adjust the headlight beam; 4. Check the oil level in the transmission and the rear axle housing. 5, check the drive shaft, check the universal joints, the front axle of the rotating parts, rear axle and other parts have no cracks or damage, check the gear meshing conditions and wear, check and adjust the main drive of the integrated gap; 6, cleaning the lubrication system, the engine is stopped, the oil sump oil is released; 7. Clean the diesel filter and replace the diesel filter. 8, check the clutch, brake pedal free travel within the specified range does not meet the standards need to be adjusted; 9, remove the radiator, remove the weeds, grease and internal scale between the core tube; 10. Check that all electrical equipment is working properly.
According to performance characteristics and scope of application, medical Masks can be divided into: medical protective masks, medical surgical masks, general medical masks.
Medical protective masks: Medical protective masks are suitable for the protection of airborne respiratory infectious diseases by medical personnel and related staff. Wear when in contact with airborne or droplet-borne respiratory infections. It can filter the particles in the air and block droplets, blood, body fluids, secretion droplets, etc. It is a disposable product. Medical protective masks can prevent most bacteria, viruses and other pathogens. WHO recommends that medical personnel use protective masks against particulates to prevent virus infection in the hospital air.
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