Aluminum alloy after processing white spotsAluminum bar, 6061T6, diameter 92, CNC turning obvious white spots on the surface, to solve the problem.
Like the water left after the coolant is dry, see if it can be wiped out
Water cooling or oil cold water cooling, then add points to indicate active agent
Hello, look at your knife is not fast, and there is the point of the car is in the car brush with a little kerosene on it, it is very light!
