The structural models of many kinds of liquid and gas distributors are mainlyd escribed.

着重综述了各种气装置和液装置的结。

The difference processing technology between thin and thick straw flakeboard and the technology of thin strawf lakeboard wered escribed.

介绍稻秸薄板和厚板的工艺区别、稻秸薄板生产工艺。