wear extent
2.The field test of CF-4 15W/40 diesel engine oil is carried out on heavy-duty Volvo,Benz,Deutz. The influences of the decay extent of oil on the dispersancy of soot,the neutralizing property of acid and anti-wear property are investigated. At the same time,the comparative test is performed against the corresponding oil brands from foreign manufacturers,supplying a technical basis for the application and popularization of home-made super quality diesel engine oils.
3.The Circulation-hydrogenation Compressor Model BLC-305/A is an important equipment with Hydrogenation devices, which is imported by Lanzhou Petrochemical Company Refinery. Due to high-speed rolling periodically, the spare parts of this compressor, to a varying extent, show a lot of signs of wear and tear. Especially, the axle sleeve of the rotor axle of the compressor is so worn to the greatest degree that its work efficiency decreases by a big margin.

