cm≥h(dcm+tdl)-(0,6ddl+tdl) coupling is overlapped, where dcm and ddl - internal pipe diameters in the coupling assembly of the closed manifold and the joined drain line respectively, tcm and tdl - pipe thickness in the coupling assembly of the closed manifold and the joined drain line respectively. In this case the length of the joined drain line doesn't exceed its maximum allowable length.;EFFECT: long-term service life of the coupling assembly of the drain lines and reliable hydrological effect of subsurface drainage during service for at least the standard service life, as a result of which the design intensity of the soil drainage and expanded reproduction of its fertility is provided during this period."/>
公开/公告号RU2520678C1
专利类型
公开/公告日2014-06-27
原文格式PDF
申请/专利号RU20130105431
申请日2013-02-08
分类号E02B11;
国家 RU
入库时间 2022-08-21 15:38:30