... .02%/year);5. According to the American military standard design and produce, preamplifier can work continuously in the environment of -50 ... 105°C;6. Preamplifier circuit adopts the fault-tolerant design to ensure that any wiring errors will not make ... turbine, hydraulic turbine, generators, blowers, compressors, gear boxes and other equipments in the industries of electric power, petrochemical, ...