The tooth surface of a spur gear was measured using the projection moiré method, and the measured results were cAomn poaprteicdawl iintshptehcotsioenfrmomethaocdomfomr egrecairaltoCoMthMs.uIrnfaacdedsiutisoinn,gththreeepfroorjmecstion moiré is propo of tooth surface deviationss,tnuadmieedl...