An underwater energy storage system includes a tank for storing a compressed gas that is adapted to be stored underwater. The tank includes at least one water opening through which water from surrounding environment can flow into and out of the tank, and at least one gas opening through which the compressed gas is received. The underwater energy storage system further includes at least one duct communicating between the at least one opening for gas flow and a source of compressed gas and a compartment constructed over a roof of the tank, wherein said compartment is adapted for receiving weights at a sinking site of the tank.

A sectional panel tank comprises one or more side wads that are joined together in forming the sectional panel tank. One of the side wall comprises a first unit panel having a first extension at a first edge of the first unit panel and a second unit panel having a second extension at a second edge of the second unit panel. By combing the second extension to the second extension, the second unit panel is joined to the first unit panel for providing a continuous surface of the side wall. No gasket is needed between the first extension and the second extension. A method of making the sectional panel tank is also disclosed. A method of making prefabricated unit panels with lining sheets is further disclosed for the sectional panel tank.

An underwater energy storage system includes a tank for storing a compressed gas that is adapted to be stored underwater. The tank includes at least one water opening through which water from surrounding environment can flow into and out of the tank, and at least one gas opening through which the compressed gas is received. The underwater energy storage system further includes at least one duct communicating between the at least one opening for gas flow and a source of compressed gas and a compartment constructed over a roof of the tank, wherein said compartment is adapted for receiving weights at a sinking site of the tank.

A sectional panel tank comprises one or more side wads that are joined together in forming the sectional panel tank. One of the side wall comprises a first unit panel having a first extension at a first edge of the first unit panel and a second unit panel having a second extension at a second edge of the second unit panel. By combing the second extension to the second extension, the second unit panel is joined to the first unit panel for providing a continuous surface of the side wall. No gasket is needed between the first extension and the second extension. A method of making the sectional panel tank is also disclosed. A method of making prefabricated unit panels with lining sheets is further disclosed for the sectional panel tank.

An underwater energy storage system includes a tank for storing a compressed gas that is adapted to be stored underwater. The tank includes at least one water opening through which water from surrounding environment can flow into and out of the tank, and at least one gas opening through which the compressed gas is received. The underwater energy storage system further includes at least one duct communicating between the at least one opening for gas flow and a source of compressed gas and a compartment constructed over a roof of the tank, wherein said compartment is adapted for receiving weights at a sinking site of the tank.

A container for alcohol, e.g., a wine bottle, formed of a polymer wall has a body that terminates in a base, a shoulder, and a neck, the shoulder forming a tapered region between the neck and the body, and the neck terminating in a finish. The polymer wall is sufficiently thick to withstand extraction forces, one hour after capping, of between 12 and 40 daN when a natural cork stopper is used and between 10 and 45 daN when a synthetic stopper is used.

The present disclosure discloses a box body drainage structure and a container. The box body drainage structure may at least include a box body having a top surface and at least three side surfaces, and a groove is formed at the top surface of the box body. A drainage channel is formed on at least one of the side surfaces, and a top end of the drainage channel is communicated with the groove through a water inlet. The drainage channel is slantwise arranged to allow rainwater in the groove to flow down along an inner wall of the drainage channel to a bottom of the box body.

A double hulled above ground liquid storage tank having an interstitial space completely surrounding the inner hull, the interstitial space being substantially filled with a corrosion inhibiting, flame resisting, freeze resistant, heat absorbing, aqueous mixture. The outer shell of the tank being coated with an intumescent coating.

The present disclosure provides a transport case, which includes a case body, the case body being internally provided with a containing space for containing materials; the case body includes a supporting framework and a protective coating, the supporting framework being coated with the protective coating, wherein the supporting framework is made of a metal material, and the protective coating is made of a plastic material. The problem in the art known to inventors of low pressure bearing capacity of the transport case is solved.