In 1978, we built a largesize testing bed for axial-flow threshing cylinder, which were changeable for three types of cylinder, four types of concave, and five types of cylinder cover.

• 1978年研制了大型轴流滚筒试验台,该试验台具有可更换的三种滚筒、四种凹板和五种上盖,可组成七种不同结构的轴流滚筒方案进行对比试验。