折边

Seal off the edgefold by using a new special heat-pressing technology, enhance prevention of side leakage.

独有新型热压密封技术，有效防止侧漏，使放心。

This paper gives the calculation method for the standard parameters such as internal surface area,volume and quality etc.of toriconical head.

本文给出了锥形封头内表面积、容积和质量等标准参数计算方法。

Second process: After operated by the front forward gas baffler, the paper reciprocates to the drum of the second layer to perform flanging of the backside.

纸张经后推气挡板之作，再往复至第二层滚筒完成前。

Third process: After operated by the back forward gas baffler, the paper reciprocates to the drum of the third layer to perform flanging of the front side.

纸张经前推气挡板之作，再往复至第二层滚筒完成后。