Tinder brush surface:
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Cork in the sink, bath
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Squatting the Mat (2 seconds)
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Knocking, blowing into the microphone,
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Battery Hits
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Air dissection
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Robot heartbeat
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Laboratory experiment
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Suitcase, cover open, close
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Bagging in the bag
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Chemistry, ground powder on the table
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Squatting the Mat (1.5 seconds)
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Closing the umbrella, Opening
★★★★★