离心泵、混流泵、轴流泵和旋涡泵试验方法 Test methods for centrifugal, mixed flow, axial and regenerative pumps

通风机基本型式、尺寸、参数及性能曲线 Basic types, sizes, parameters and characteristics of fans

单张纸平版胶印机 技术条件 Specification for sheet-fed planographic offset press

起重机设计规范 Design rules for cranes