... /100/120 Series 1. Purpose and character 1.1 Purpose:Cutting work-piece easily, high efficiently, perfectly and cheaply, including ... container, food, medicine machinery, petrol and chemical, environment, ventilation equipment, automobile, train, shipbuilding, etc.2.1.2 It’s convenience ... . So, it is higher reliability.2.1.4 Low air pressure protection (indicator), over-head protection and want phase ...