|
Why don’t we use copper in transmission lines?
http://pxg.kzsoft.com.br/member.php?217351-MiguelPed
Chile Copper Production To Slow Over Operational Challenges, With Downside Risk To Mining Investment
http://hypnotronstudios.com/simpleForum/index.php?topic=241632.0
Copper was discovered in China around 2800BC
http://forum.spolokmedikovke.sk/viewtopic.php?f=3&t=2829
Copper Market: Rising Geriatric Population And Incidence Of Target Conditions
http://junlinro520.gain.tw/viewthread.php?tid=362395&page=1&authorid=296880
Why Is Copper So Valuable?
http://yonghengro.gain.tw/viewthread.php?tid=569207&extra=
Why is Copper a Good Conductor of Electricity?
http://www.empirecityusa.com/phpBB3/viewtopic.php?t=39208
|
|