n.多速
In factories, it can design the simplex winding multiple-speed motors to change the type of winding attachment about the current single speed motors. 在工廠中，通過對現(xiàn)有的單速電機(jī)進(jìn)行繞組改繞來設(shè)計(jì)單繞組多速電機(jī)。
