Hygrometers; Salinometers; Acid hydrometers; Climate control digital thermostats; Electric light dimmers; Electro-dynamic apparatus for the remote control of signals; Electronic collars to train animals; Temperature indicators; Time switches, automatic

'acid':3 'anim':26 'apparatus':15 'automat':31 'climat':5 'collar':23 'control':6,19 'digit':7 'dimmer':11 'dynam':14 'electr':9 'electro':13 'electro-dynam':12 'electron':22 'hydromet':4 'hygromet':1 'indic':28 'light':10 'remot':18 'salinomet':2 'signal':21 'switch':30 'temperatur':27 'thermostat':8 'time':29 'train':25

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