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electricity × 50home × 8
batteries × 7
substitute-tool × 6
technology × 5
comfort × 4
safety × 4
car × 3
appliances × 3
energy × 3
cleaning × 2
efficiency × 2
clothing × 1
kitchen × 1
water × 1
phone × 1
bedroom × 1
winter × 1
plastics × 1
headphones × 1
office × 1
cables × 1
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