Installation of fixed wire-speed devices 加装定线速装置
planetary speed changing devices 行星轮变速装置 ; 行星轮变速装配
Speed Limitation Devices 车速限制装置
Speed Indication Devices 车速显示装置
very high-speed devices 超高速器件
Ultra-high-speed devices 超高速器件
High-speed devices and photonic links 高速设备和光子链接
Lost speed detection devices 失速报警装置
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