Energy_Information

Engineering_Toolbox

Energy_Information Administration

red-bag.com

Energyvision.org(에너지대안센터)

techstreet.com

Energy & Environment 

tasonline.co.za

Related Energy Links

eng-tips Forums

aveva.com

Pipe Design Strategy

engineeringtoolbox.com

onlinemetals

Weldnet.co.kr

kpi.or.kr(물가정보)

Contract Supervision & Research(건설계약)

mcmaster.com 

conscons21.com(건설정보)

International Economics

Useful - Link

Links to useful sites

영문주소 표기법

www.iie.com(세계경제연구소)

한자사전

email:pipe@pipedesign.co.kr