self-operate differential pressure control valve
静态水力平衡阀 static hydraulic balancing valve 自力式压差控制阀 self-operate differential pressure control valve 自力式流量控制阀 self-operate flow limiter ..
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self-operate differential pressure control valve
自动操作压差控制阀
以上为机器翻译结果，长、整句建议使用 人工翻译 。