commutator GMAT

This paper is a study on the invertibility of the commutator of scalar-idempotent elements and scalar-involutory elements of a unitary ring.

本研究在一个有单位元环中两个倍幂等元换位子与两个倍对合元换位子可题。

We can machine the commutator and voltameter,we have to deliver them to the shop for rectifying.

我们可以把换向器车光并拉槽。至于电流表与电压表，我们得送到车间去调整。