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.
我们自主开发研制的滚筒式无氧褐煤提质干燥机。
We independently developed the drum dryer to mention quality oxygen-free lignite.
我们自主开发研制的滚筒式无氧褐煤提质干燥机。
We independently developed the drum dryer to mention quality oxygen-free lignite.
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