[网络] 手动换向阀 manually operated control valve: 手动控制阀manually operated down valve: 手动下降阀manually operated valve: 手动操纵阀; 手动阀manually-operated valve: 人工操作阀; 手动阀solenoid operated directional valve: 电磁换向阀下载手机词典可随时随地查词查翻译