... (Mechanical Engineering, Heat Engineering - Refrigeration, Industrial Machinery and Equipment) TIẾNG ANH CHUYÊN NGÀNH MÁY VÀ THIẾT BỊ Tp Hồ Chí Minh, 2008 ... UNIVERSITY OF INDUSTRY DEPARTMENT OF INDUSTRIAL MACHINERY AND EQUIPMENT LY NGOC MINH, M.Eng SPECIALIZED ENGLISH FOR INDUSTRIAL MECHINERY AND EQUIPMENT (Mechanical Engineering, ... to avoid chattering, instability and damage to the valve and valve seat. They must have adjustment features for both the relieving and blow down pressures and, finally, they must be tamperproof...