1.( 2 ) Magnetic Hollow porous Polystyrenemicrophere(MHP) characterized with easier recovering , high efficiency and many advantages, as anew sorbent packing with SRB and CSB, is fit for this technological process.
2.Introduces the realization of a mark CAD system used in packing industry. The processing method of hollow Chinese characters while using AUTOCAD as the graphic supporting software is also introduced simply.
