OP30 flat head length <br>measurement method: contour meter <br>detection frequency: 1 piece / first and last / shift, random inspection 2 pieces / each shift <br>control method: three self-three inspection records, process inspection records <br>OP90 fine grinding outer circle <br>detection method: contour instrument <br>detection Frequency: 1 piece / first and last / shift, 2 random <br>checks / each control method: three self-check records, process inspection records
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