In this paper, A theorectical analysis of the defective nec k-narrowing in the manufacturing process of the medium resolution CPT is given, then the solutions for this problem are described in detail.

• 对中分辨率显像管涂屏制过程中出现的“缩颈”现象，进行了理论分析，同时具体介绍了对策此不良的方法。