After the 3# screw machine was put into use in 2000, it has been running for 23 years with a total running time of 48,149 h;<br> At present, the oil leakage fault needs to be repaired; When in use, the regulations of pressure vessel management stipulate that the evaporator and condenser need to be replaced for screw machines over 20 years; Comprehensive evaluation, choose a new machine to replace;
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