它有足够的能量克服阀门和记录器的摩擦阻力。
It has enough energy to overcome the frictional resistance in valves and registers.
而且其结构可以没有滑道大幅度的减少摩擦阻力。
Friction resistance can be greatly reduced because no slide way is arranged.
水钉的作用，使土钉体外表面与土体界面接触粘结力与摩擦阻力显著降低。
By action of water to nail, Bond between soil and nail a was obviously reduced.
水钉的作用，使土钉体外表面与土体界面接触粘结力与摩擦阻力显著降低。
By action of water to nail, Bond between soil and nail a was obviously reduced.
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