凹形腹板贯通式
depressed web plate through type
半横向式通风
Semi-transverse ventilation
半连通式蓄热室
semi-connection regenerator
边界式通风系统
unidirectional ventilation system
便携式通讯终端
portable communication terminals
便携式通用数字无线通信系统
UDPRC Universal Digital Portable Radio Communication
补偿式通用分流器
compensating universal shunt
差分式通讯总线
differential communication bus
敞开式通用电动机
open general-purpose motor
穿通式连接条
pass through partition connector