椭圆形扬声器 meaning in Chinese

ellipse speaker
elliptical loudspeaker
oval loudspeaker

Sound system equipment . part 14 : circular and elliptical loudspeakers ; outer frame diameters and mounting dimensions
音响系统设备.第14部分:圆形和椭圆形扬声器.外框直径和安装尺寸
Sound system equipment - guide for circular and elliptical loudspeakers ; outer frame diameters and mounting dimensions
音响系统设备.第14部分:圆形和椭圆形扬声器外框的尺寸和安装尺寸导则