Drawing b: QDB belt conveyer may directly load matters to car.

图b：QD B型装载输送机是把输送机送来的物料直接对汽车装载。

youdao

Drawing b: QDB belt conveyer may directly load matters to car.

图b：QD B型装载输送机是把输送机送来的物料直接对汽车装载。

youdao