| 摘要 |
The gun prevents the stray emission and resolution deterioration caused by the transformation, scrach, or the sharp edge made during assemblage, and includes holes formed on the surface (11) and a second electrode (2) for beam passages (11a,11b,11c) and bead rings (11a',11b',11c'). The bead stems (11a,11a') formed on the center of a plunger unit (12), and mandrill inserting grooves (12b,12b') depositing on the plunger to face each other.
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