差分式前置放大器
differential preamplifier
发动机前置式客车
bus with front engine
all wheel drive automobile
前置式洞口工法
advanced entrance construction method
AECM
前置式空气预热器
frontlocated air preheater
前置式口令检查
proactive password analysis
前置式喷雾加湿风机
pre-spraying adding humidify fan
前置式双级主减速器
front mounted double reduction final drive