管道阻力: duct losspipe resistancepipeline resistanceresistance of ductingresistance through passage
Example Sentences:
1.
It allows maximum flow from the air supply valve ; it makes people easy to breath by appropriate air supply in dangerous working condition 供气阀流量大，呼气阻力小，且可大流量调节，使作业人员在任何险恶环境下，工作轻松自如。
