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Pemegang paten plastik


giffari akbar
Posts: 3
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Topic starter
(@lovearth)
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Joined: 5 months ago

Siapa yang menemukan plastik pertama kali? dan menurut kalian, apakah penemuan plastik sudah di paten kan? 😥 

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NIA HERMINANTI
Posts: 1
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(@nia-herminanti)
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Joined: 5 months ago

Leo Baekeland??

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