فهرست مقالات Auxiliary Gas دسترسی آزاد مقاله صفحه چکیده متن کامل 1 - The Effect of Focal Distance and Type of Auxiliary Gas on Cut Width in CO2 Laser Cutting of Stainless and Mild Steel Sheets Hossein Taheri Hamid Zarepour Firouzabadi Majid Hashemzadeh