Back the tin liquid CL-8540
The nitric acid CL-8540 type backs a tin liquid, set cent one, don't contain fluoride and lead to oxidize hydrogen and net to match, since can used for machine to spray, may also used for immersing, the function is well-found, good quality, eclipse copper the velocity is small and back tin|lead after, the plank noodles is shining, if spray with the machine, assist to add medicine system by auto, the effect is better.