원유만

Economic Evaluation for Heating and Cooling System by Using Gas Energy and Geothermal Energy Based on LCC Analysis

KimYongSu, 이일규, Kang Hyun Wook, 2011 .

Linear step motors

원유만, 2009 .

A Study on the Long-Term Maintenance Costs and Elemental Maintenance Costs for Apartment Buildings

KimYongSu, 강현욱, 원유만, 2010 .