说明：  VPX新一代总线标准 VPX（即VITA46）：在VME系统的基础上增加了交换互联结构，是军用加固系统的新一代 总线产品。支持PMC和XMC子卡，并最大限度的保留了对VME系统的兼容性。
(Generation bus standard VPX VPX (ie VITA46): VME system based on the increase in the exchange of interconnect structure, is a new generation of military reinforcement system bus products. PMC and XMC daughtercard to support and retain the maximum of the VME system compatibility.)