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pneumatic barrier
A pneumatic barrier is a method of containing oil spills. Air bubbling through a perforated pipe causes an upward water flow that slows the spread of oil. It can also be used to stop fish from entering polluted water. Pneumatic barriers are also known as air curtains.
A pneumatic barrier is an ''active'' (as opposed to ''passive'') method of waterway oil spill control. (An example of a passive method would be a containment boom.)
==Method of operation==
The pneumatic barrier consists of perforated pipe and a compressed air source. Air escaping from the pipe provides a "hump" of rising water and air which contains the oil spill. Anchors keeping the pipe in a decided spot are helpful.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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