Electrode whitening what reason?

Answer:

Drug skin efforescence phenomenon. Domestic skin often add a small amount of soda, easy to press coating. Soda will brighten during storage, the local white skin medicine.

Damp, drug ingredients skin ran out.

What welding rod?

Difference between J422 welding rod and J502 welding rod
What are the welding electrodes?
Who knows a package of ordinary 422 electrode, how many roots ah, small packets of that kind, a small package, how much money, I would like to know how much an average electrode, a little difficult
What kind of welding rod used for HRB500 steel bars?
One millimeter thick iron direct current welding machine welding 3.2 electrode, need much current?

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Electrode whitening what reason?

Answer:

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