GB/T 21971-2020YZD系列起重用多速三相异步电动机技术条件标准
英文:YZD series multi-speed three-phase induction motors for crane application—Technical specification GB/T 21971-2020介绍: ...
英文:YZD series multi-speed three-phase induction motors for crane application—Technical specification GB/T 21971-2020介绍: ...