Topics from December 2020
- What are water trucks used for?
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- How does a garbage truck work?
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- How tow truck works?
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- How bicycle pedal works?
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- How fork lift works?
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- How conveyor belt works?
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- How lift works?
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- How container truck works?
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- How food mixer works?
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- How pushchair helps to move things?
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- How escalator machine helps to move things?
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- How crane machine helps to move things?
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- How grocery trolley machine helps to move things?
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- How potter's wheel machine helps to move things?
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- What is CD-ROM?
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- What is digital code?
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- What is binary code?
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- How microprocessors work?
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- How hologram works?
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- How DVD player works?
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- How CD player works?
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- How toilet machine works?
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- How hairdryer works?
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- How vacuum cleaner works?
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- How washing machine works?
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- How toaster works?
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- How refrigerator works?
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- How thermometer works?
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- Who are inventors?
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- Which are the inventions we see at home?
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