调差,escalation
Differential adjust差动调整
3)differential trimming差动微调
4)error pre-adjustment误差预调
5)tolerance conformance公差协调
6)nondiscrepancy regulating speed无差调速
1.This paper explained on DC driving system of X2012A plane miller working board, based on electric heavy repair realized use discrepancy regulating speed system as a substitue for nondiscrepancy regulating speed.本文论述了X2012A龙门铣床工作台的直流驱动系统通过电气大修改造实现以无差调速取代有差调速电控系统。
延伸阅读

差差1.犹参差。不齐貌。