...rol 继电器控制，继电控制relay control system 继电控制系统relay core 继电器铁心relay emergency valve 应急继动阀(RE valve)relay governor 继动调节器relay just-release value 继电器始可释放值relay lamp 附加转向指示灯relay le es 替续透镜relay mus...
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短语
挂车制动应急继动阀
trailer braking relay emergency valve