... Oil & gas industry, Locomotive industry, Aerospace, Hardware, Construction, Engineering Machine, Electrical Equipment, etcMachining EquipmentThreading, Turning, Milling, Grinding, CNC ... demandFAQ:1. Are you a factory or trade company?-------We are a factory. We provide you one ... is a poisonous, nonmetallic element that helps protect metal surfaces from corrosion. Atomic number 15, atomic weight ...