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They didn't have eletric during that time so they use gas lighting
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They help keep food cold and they need fatory to make them grow so there was a lot of work
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They put paper toghter so they wouldnt fall alpart and they made a lot of jobs
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They help people tp clen ther edish faster and maed alot mopre jobs for people
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They made it easyer for people to talk to each other