发明授权
US3576109A Flexible wall means 失效
柔性壁装置

Flexible wall means
摘要:
A water dam is formed by a succession of flexible wall members in the form of upwardly open watertight bags. By filling the bags with water their adjacent sides are urged into sealing contact with each other and they are caused to sink into sealing engagement with the bed of the water basin being dammed.
信息查询
0/0