maintenance and/or repair of [ personal lighting apparatus; ] apparatus for charging batteries; communication apparatus and instruments and controls therefor; apparatus and instruments for detecting, measuring, analyzing and recording fluid flow, air currents, gas, mist, dust, noise, pressure and temperature; fire and danger alarms; sound measuring instruments; respiratory protective apparatus; eye, ear, head and face protective apparatus; and fire extinguishing apparatus; including testing and calibration

'air':30 'alarm':42 'analyz':25 'and/or':2 'apparatus':7,8,13,19,48,55,59 'batteri':11 'calibr':63 'charg':10 'communic':12 'control':17 'current':31 'danger':41 'detect':23 'dust':34 'ear':50 'extinguish':58 'eye':49 'face':53 'fire':39,57 'flow':29 'fluid':28 'gas':32 'head':51 'includ':60 'instrument':15,21,45 'light':6 'mainten':1 'measur':24,44 'mist':33 'nois':35 'person':5 'pressur':36 'protect':47,54 'record':27 'repair':3 'respiratori':46 'sound':43 'temperatur':38 'test':61 'therefor':18

MSA

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