“种差”怎么读？

“种差”的英语可以翻译为：[逻] specific difference，differentia，differentiae ...

本实用新型涉及一种差动交流调速电动机装置.The utility model relates to a differential alternating current adjustable - speed motor device.显然该新型差动保护兼有两种差动保护优势.It is evidently that novel scheme obtains both excellences of the above two differe...