Friction head loss 沿程水头损失
total friction head 总摩擦损失
Friction Head Losses 沿程水头损失
friction resistance head 摩擦阻力损失压头
friction loss of head 沿程水头损失
friction mandrel resistance head 损失压头
friction loss of water head 摩擦损失水头
However, For pipes with local resistance loss, the friction head loss caused by the viscosity of fluid does exist, which may lead to the calculation error.
但是在形成局部阻力损失的管段中，还会同时伴随产生由于液体的粘性力引起的漩程水头损失，这就造成了这项损失的计算误差。
Experiments are made on locomotion force, velocity, locomotion ability on surfaces with different friction coefficients, and pose of the head cabin.
对机器人的牵引力、运动速度、在不同摩擦系数介质表面上的运动能力、头舱姿态进行了试验。
First, it roughens the texture of the match head, helping to create friction wherever you strike it.
首先，它使火柴头的质感变得粗糙，有助于产生摩擦力，无论你在什么地方划火柴。
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