经过大量的有效试验，新型的多层滚筒式气流干燥机试验成功，成为各个干燥厂竞相选用的机型。

After many experiments, we have developed new-style multilayer air roller dryer and it has become the preferred model by many marigold plants.

youdao

经过大量的有效试验，新型的多层滚筒式气流干燥机试验成功，成为各个干燥厂竞相选用的机型。

After many experiments, we have developed new-style multilayer air roller dryer and it has become the preferred model by many marigold plants.

youdao