The plate-shaped main body is formed with a through hole connecting the bottomface and the second face.
所述板形主体形成有连接所述底表面与所述第二表面的通孔。
2
The contacting area of the electron-emitting layer and the cathode electrode is limited to the periphery except a center part on the bottomface of the hole.
The slip effect of bolting bottomface and side face plate of RC beam is derived under elastic condition and its influence on strength and rigidity of RC beam is obtained.