friction resistance head摩擦阻力损失压头
friction n head loss摩擦水头损失
friction n head摩擦水头
friction axis head摩擦损失的压头
friction head loss摩擦水头损失;沿程水头损失
friction head west bank摩擦水头
friction loss of head沿程水头损失
total friction head总摩擦损失;总摩擦落差
Friction Head Losses沿程水头损失