gngCOCA²⁴⁸²⁴⁸BNC²³⁶²¹³⁺¹ 基本例句 abbr.商品等的分级；分等grading In this paper, the principle system, design characteristic, technology performance of high voltage vacuum power supply in GNG series inverter type are briefly mentioned. 本文就 GNG系列逆变式高压真空直流电源的原理系统、设计特点、技术性能等做一简要论述。 cnki