All of the elements 1 to 4 are kept in out position by the hydraulic pressure that is exerted by the reservoir 5 on the bottom of the ballast 4 whose water was evacuated.

元件1到4的所有元件通过由在压载物4底部的蓄水池5施加的液压保持在外部位置，压载物4的水被排空。

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All of the elements 1 to 4 are kept in out position by the hydraulic pressure that is exerted by the reservoir 5 on the bottom of the ballast 4 whose water was evacuated.

元件1到4的所有元件通过由在压载物4底部的蓄水池5施加的液压保持在外部位置，压载物4的水被排空。

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