... Units Produced(Previous Year) Air Cooler, Air Cooler & Heater, Heater, Electric Fan, Oiled Heater Air Cooler: 60,000 pcs per year ... ,000 pcs per year,Heater: 10,000 pcs per year,Electric Fan: 10,000 pcs per year,Oiled Heater: 10,000 ... of Year(s) Used Condition Ground resistance tester TG2702 1 5.0 Acceptable Withstand voltage tester JJ2672B 3 5.0 Acceptable Electrical parameter ...