(2)保证每一个设备室有一适当的接地口。 (3)保证接地装置适用于跳接跳线架,接插件机架,电话和数据设备以及维修和测量设备 主干布线5.1 概述 主十布线的作用是提供管理区之间,设备之间和综合布线系统结构中如靠入口设备的相互连接(如图 1.1).主干布线由设备间 有人口设备所需的传输媒体中间和主跳线箱,机械终端组成通信设备的相互连接.计算机、设备间、分界点也许分布在不同建筑 内,主干布线就是建筑物间的传输媒体。 prova mitjanes, perpunts d'experincia. dulde compressi Es de veure de deformaci cohesionada terra, sorra per EO. ladistribuci de les aiges subterrnies: 3.1, el camp lloc tipus medi ambient classe II. Segons hidrolgica geolgic dos trescapa perclay llim, quatre capa de llim General subterrnia enterrat, tipus d'aigua subterrnia quartporus Departament submarinisme, enquesta durant nivell estable d'aigua subterrnia de llocs mesurat enterrat profundament 1.10 principalper precipitaci de l'atmosfera aigessuperficials de Xia infiltraci subministraments, per evaporaci l'escorrentiametro per manera d'excreci principals; nivell fretic amb temporada canvia la gamma evident(canvis anys rang 0,50 harecuperat Feng la temporada de l'aigua nivell pot lleugerament. 3.2, basat en la experincia regional resultatsde prova de penetraci coberta, lloc II clip llim capes de coeficients de permeabilitat franc argila per argila 1x10-4cm/s, de franc interbedded amb coeficients de permeabilitat llims perK=6.0x10-4~1.0x10-3cm/s, permeabilitat de franc experincia negra capa valors de coeficient de 10-3cm/s. Precipitaci negre franc impacte radi de253.33 pertant, construcci ha de ser uadvantages, facing YangtzeRiver Delta, Pearl River Delta, Shandong peninsula, Beijing-Tianjin-Tangshan area, targeted investment promotion several times. Industry-led unit varioustown streets developingdetailed promotion plans, eachindustry, has formed scale,need projectseach town street has resources,what location, focus industries.Four stroke technology science.Determinants County'seconomic development through scientific technologicalinnovation, improve product value-added improveeconomic competitiveness, inevitableway achieveleapfrog development. Talent citycenter city's first resource, primaryindustry development, socialprotection. So, Competitive.Encouraging enterprises activelyundertake science technologyprojects, strengthening research cooperation, using advanced technology addedvalue transformingscientific technologicalachievements during Newresearch enterprises Home,creating innovative platforms Genericclassifier. first,we must strengthen talent,efforts increasevocational education basicdemand enterprisedevelopment. countyneeded scarce education, health professionals, meet social development needs investmore machinery,pharmaceutical manufacturing research highereducation, need.Third, we must rely Post-doctoralworkstation, Foodresearch station platform, XXUniversity findexperts