Before the round endorsement on the shell to home-made round back on to the nucleus Raphe Magnus, facilitate its warm up and back, and make the back and middle neurorrhaphy book sealed shell.

• 圆背书上壳前要在自制的圆背工具上对中缝预热成型，方便其与书背吻合，并使书背与书封壳中间吻合一致。