Telescopes; Car stereos; Computer hardware for telecommunications; Distance measuring apparatus; In-ground traffic lights being signalling devices; Multimedia projectors; Photography darkroom lamps; Protective helmets; Smart glasses; Smart rings; Smartphone battery chargers; Soundbar speakers; Teaching robots; Videocameras; Wireless headphones

'apparatus':10 'batteri':31 'car':2 'charger':32 'comput':4 'darkroom':22 'devic':18 'distanc':8 'glass':27 'ground':13 'hardwar':5 'headphon':39 'helmet':25 'in-ground':11 'lamp':23 'light':15 'measur':9 'multimedia':19 'photographi':21 'projector':20 'protect':24 'ring':29 'robot':36 'signal':17 'smart':26,28 'smartphon':30 'soundbar':33 'speaker':34 'stereo':3 'teach':35 'telecommun':7 'telescop':1 'traffic':14 'videocamera':37 'wireless':38

XIAOTINGZI

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