上部区段，由传动链轮及带有轨道(双排链)的上部机壳、卸料口组成。

Upper section composed of driving sprocket upper casing with rails (double chain) and discharging outlet.

youdao

上部区段，由传动链轮及带有轨道(双排链)的上部机壳、卸料口组成。

Upper section composed of driving sprocket upper casing with rails (double chain) and discharging outlet.

youdao