Please be informed we need your help to go to AXO on Monday or Tuesday in order to measure hardness on every pieces of this 20pcs.
You must check at least
1) One forth of diameter from surface. Check at least 4 pints (likes north, west, east and south)
2) One point at center and one point at 30mm. from center.
Totally at least 6points
Please advise me which date and time is your convenience. I will coordinate with K. Somchai for you.