voltmeters, wattmeters, frequency levelmeters, line fault analyzers, reflection coefficient meters, wave analyzers, double stub tuners, directional couplers, data transmission test sets, frequency selective level meters, envelope delay test sets, noise loading test sets, digital transmission test sets, line conditioning test sets, line repeater test sets, signal generators and test sets for the telecommunications industry

'analyz':7,12 'coeffici':9 'condit':39 'coupler':17 'data':18 'delay':27 'digit':34 'direct':16 'doubl':13 'envelop':26 'fault':6 'frequenc':3,22 'generat':47 'industri':54 'level':24 'levelmet':4 'line':5,38,42 'load':31 'meter':10,25 'nois':30 'reflect':8 'repeat':43 'select':23 'set':21,29,33,37,41,45,50 'signal':46 'stub':14 'telecommun':53 'test':20,28,32,36,40,44,49 'transmiss':19,35 'tuner':15 'voltmet':1 'wattmet':2 'wave':11

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