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.
每厘米的船，是在与水接触的诱导阻力。
Every centimeter of the boat that is in contact with the water induces drag.
每厘米的船，是在与水接触的诱导阻力。
Every centimeter of the boat that is in contact with the water induces drag.
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