网孔波纹填科是在金属薄板上冲出菱形微孔同时拉伸成网孔，
该填科兼有丝网和孔板波纹填料的优点。
n Mesh corrugated packing is punched lot of diamond-shaped tiny holes
n at metal thin slab．It keeps the properties of gauze packing and mellapale
n packing．
n Size(X,Y):SW-I,SW-II