... the different natures of the materials, the selection must be different. But the materials are made of stainless steel or specific materials. The ... lubricating oil, spices, dyes, emulsified asphalt, emulsified rubber, catalyst, paint coating etc.3. Pharmaceutical Industry: ... balsam, soap, and detergent, etc5. Other Industry: building industry, paper industry, plastic industry, battery industry, etc. ...