[油气] 人控换向阀 solenoid operated directional valve: 电磁换向阀pilot operated directional control valve: 液控换向阀manual operated: 人工控制的; 手动操作directional valve: 定向阀; 方向阀manual valve: 手动阀; 手控阀下载手机词典可随时随地查词查翻译