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  • Brainly User
2014-05-02T15:33:27+05:30

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First make a list of all the heavy industries of the world
then focus on the important products of each industry 
if you're going to do a seminar or a presentation, insert a lot of photographs than text because it will become difficult and boring for the audience if your presentation has more of text 
the only way you can get all this is through the internet
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