1. the general coating of the plane or curved surface parts, according to the characteristics of paint, use a flat brush, plate brush or row brush
2. the surface area of the coated material is large selection brush brush brush brush brush width, small area selection brush brush narrow brush
3. the coated material hidden part or the operator is not easy to move the standing position, can choose long crooked handle paint brush
4. the surface is rough coating, such as casting, can choose round paint brush, because round paint content is much, easy to make paint wet rough surface, and infiltration hole
5. draw lines and patterns can choose flat brush
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