| 主权项 |
1. A floatable bellows container assembly, comprising: a large diameter bellows container and a small diameter bellows container, wherein
the large diameter bellows container has an access opening, the access opening is sized to be smaller than a cross sectional area of the small diameter bellows container; the large diameter bellows container and the small diameter bellows container are floatable; if the floatable bellows container assembly is oriented in such a manner that the access opening is in an upper position, water flows into the floatable bellows container assembly, and the floatable bellows container assembly is expanded with aid of weight of the water and floatability of the large diameter bellows container and the small diameter bellows container; if the floatable bellows container assembly is oriented in such a manner that the access opening is in a lower position, the floatable bellows container assembly is squeezed by a heavy object on the floatable bellows container assembly, and the floatable bellows container assembly is collapsed along with draining of the water; and a push-down pressure is generated by putting the heavy object on a top of the floatable bellows container assembly, and the push-down pressure is not varied due to properties of material of the floatable bellows container assembly. |
