List of Articles راندمان گرمائی Open Access Article Abstract Page Full-Text 1 - Experimental Study of the Effect of Using Fin on the Fire Tube of Gas Pressure Reduction Station Heater on Thermal Efficiency and and Reducing the Emission of Greenhouse Gas Saeed Rastegar Hadi Kargarsharifabad Nader Rahbar Mohammad Behshad Shafii, 10.22034/jest.2020.51771.5041