起重及冶金用变频调速三相异步电动机技术条件 第2部分:YZP系列起重及冶金用变频调速三相异步电动机(轴流风机冷却)
Specification for variable-frequency adjustable-speed three-phase induction motors for crane and metallurgical applications—Part 2:YZP series variable-frequency adjustable-speed three-phase induction motors for crane and metallurgical applications(cooled with axial fan)