| 摘要 |
<p>The invention relates to a boom which includes an elongated air-inflatable buoyant body (1) made from a fabric material, a curtain (2) which depends from the lower edge of the buoyant body, and an automatic air-filling and air-emptying valve (7) provided on the upper side of the buoyant body (1). The air valve (7) is connected directly to a connecting tube (8) which extends from the valve and through the buoyant body (1) to an open end located adjacent the lower edge of the buoyant body and intended for closure by water that penetrates the boom.</p> |
