the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to u0433u0438u0434u0440u043eu0442u0435u0445u043du0438u043au0435 and may be used in the construction of canals and reservoirs, which included acts of alarms water levels. purpose u0438u0437u043eu0431u0440u0435u0442u0435u043du0438u00a0 u00a0u0432u043bu00a0u0435u0442u0441u00a0 resilience.cladding contains concrete 1 with the u043eu0431u0435u0442u043eu043du0438u0440u043eu0432u0430u043du043du044bu043c valve which includes external and internal rings 3, 4 and 5, u043fu0435u0440u0444u043eu0440u0438u0440u043eu0432u0430u043du043du043eu0435 saddle 6, a filter 7, a film u043cu0435u043cu0431u0440u0430 n 9 with u043fu0440u0435u0440u044bu0432u0438u0441u0442u044bu043cu0438 circumference u043fu0440u043eu0440u0435u0437u00a0u043cu0438. the shift between the u043fu0440u043eu0440u0435u0437u00a0u043cu0438 at each subsequent membrane is equivalent to half the angular step between them, and the radius and length of slots increased. 5).
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