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The green part of the circuit board is made of what material, gray it?: Green for the green oil, paint is to add some chemical medicine, medicine is the main purpose is to prevent oxidation of pcb, just by the paint effect is not very good, green oil main role is to copper platinum insulation; gray also Is composed of gray paint and syrup, the main role is the wiring density of the circuit board for a large area of insulation;
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The green part of the circuit board is made of what material, gray it?