The method of the invention is simple in technology, easy in material obtaining, low in cost, easy in popularization and utilization, and suitable for large-scale industrial production.
本发明方法工艺简单、原料易得、成本低、易于推广应用，适于规模型工业化生产。
The utility model has the advantages of simple structure, simple manufacturing technology and low production cost, and is suitable for popularization and application.
优点是结构简单、制造工艺简单、生产成本低、适于推广应用。
应用推荐