1. Ntawm lub hauv paus ruaj khov lossis workbench, ntsia kom raug, ib puag ncig tsis muaj kev vibration thiab tsis muaj corrosive nruab nrab;
2. The fluctuation range of the power supply voltage should not exceed ±10 percent of the rated voltage, the power supply of the testing machine should be reliably grounded, and the frequency fluctuation should not exceed 2 percent of the rated frequency;
3. Chav tsev kub yog 10 degree -35 degree, thiab tus txheeb ze av noo tsis ntau tshaj 80 feem pua.
