TQSF MODEL ASeries De-stoner Intro TQSF Model Aseries specific gravity classified stoner has been imporoved on the basis of the former gravitational force classified stoner. It is the latest generaton classified stoner. It has features such as stable technological performance, raliable running, firm structure, cleanable screen face, low maintenance etc. It esp. Adopts NO. "8928366" patent technique. It ensures that when the feeding interrupts during stop type operation, the feed won't run away at the stone outlet. It is widely applicable for the stoning of the stuffs such as wheat, paddy, soybean, maize, sesame, malt, etc.