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 Екатерина11

link 24.09.2007 10:23 
Subject: “heat and pressure” patent
Как описать патент?

This year marks the 100th anniversary of Bakelite. Baekeland filed his famous “heat and pressure” patent on July 13, 1907.

Спасибо

 Алвико

link 24.09.2007 10:36 

 

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