英语翻译one voltage free normally open sensing contact of rating 48V DC 3amps,wired from fire alarm panel to elevator shafts at ground floor

英语翻译one voltage free normally open sensing contact of rating 48V DC 3amps,wired from fire alarm panel to elevator shafts at ground floor 英语翻译magnitude of voltage? voltage Voltage free dry contact 翻译成中文是什么? 英语翻译max.voltage fluctuations:± 10% of the normal voltage excess voltage class II 英语翻译Accordingly,the selected interim pulse can be one at which the voltage is above a predetermined level for efficient erase procedures,but less than the maximum erase voltage to be applied. 英语翻译TransformerTypes and construction of TransformerA Transformer is a device that changes ac energy at one voltage level into ac electric energy at another voltage level through the action of a magnetic field .It consists of two or more coil 英语翻译collector-emitteremitter-collectorbreakdown voltage collector-emitter in one's free One is called free Spoil one's free 英语翻译resistance that will limit the current in a conductor to one ampere when the voltage applied to the conductor is onevolt. 英语翻译The description of its operating principle is based on the assumption of a constant output voltage,and hence constant output current,over one switching cycle. 英语翻译high voltage is necessary for long transmission line while low voltage for safe use. 英语翻译Symmetrical at highest voltage for equipment Asymmetrical t highest voltage for equipment 英语翻译上面铭牌同时有：rated line voltage 345kVqualification voltage 46kV In one's free/spare Buy One,Get One Free!啥意思