double revolving disc refiner 双动盘磨机

double-revolving-field theory 双旋转磁场理论

double revolving stage 双层旋转舞台

double revolving-field 双旋转磁场

Double-cone revolving vacuum drying machine 双锥回转式真空干燥机

double leaf revolving hyperboloid 双叶旋转双曲面

double-cone revolving around long axis 绕长轴旋转的双锥混合器

new double-tube high-pressure revolving springkler 新二管法高压旋喷