Equal Tee should be used in the production of portable hardness tester in the specified location (branch, head, shoulders, weld) macro hardness check, check each location to take 3 to 5 equally spaced points for hardness testing, calculate several The average of the points was taken as the result of the examination. Each batch of products should be pumping 3% and not less than 2 to do the surface hardness test, the results if one failed, should be double test, if there is still a failure, should be tested one by one.
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