disk seal meaning in English

盘封
盘形封口

Detail specification for disk seal tube of type 6c18t
6c18t型盘封管详细规范
Blank detail specification for disk seal power tubes
盘封电子管空白详细规范
Measurement of the electrical properties of microwave tubes ; part 3 : disk seal tubes
微波管电性能测量.第3部分:盘封管
Measurement of the electrical properties of microwave tubes . part 3 : disk seal tubes
微波管电性能的测量.第3部分:盘封管
Harmonized system of quality assessment for electronic components . blank detail specification . disk seal power tubes
电子元器件质量评估协调体系.空白详细规范.盘形密封功率电子管