真空下降
reduction of vacuum degree
Loss of Vacuum
集材装置
overhead cableway skidding
集材机转向液压装置
skidder steering hydraulics
集便装置
dejectas collection equipment
the device for night soil collection
dejecta collecting device
dejectas collecting equipment
dejectas collecting device
急速上颚扩大装置
Rapid maxillary expansion appliance
集成电路距离保护装置
integrated circuit distance relay device