1) printing press a) 1440 b) 1330 c) 1550 d) 1880 e) 1990 f) 1770 2) paper a) 1330 b) 1000 c) 100 d) 1890 e) 500 f) 1600 3) wheel a) 2000 b) 1500 c) 1100 d) 2 e) around 3.500 BC f) 100

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