黑枪玉 Turbinicarpus gielsdorfianus
枪玉
Gun jade
以上为机器翻译结果，长、整句建议使用 人工翻译 。
本文叙述了彩色显像管三枪“目玉”缺陷的主要成因，找出消除办法，取得显著成效。
In this paper, the main causes of the defect black dot on the surface of cathode in CPTs are described in detail , some measures are adopted and the apparent results are achieved.
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