免费看黄色片_亚洲蜜桃V妇女_国产精品9999久久久久仙踪林_FREECHINESE内射少妇

在750千伏輸電(dian)線(xian)(xian)(xian)路(lu)上應用擴徑導線(xian)(xian)(xian)，既可(ke)以減(jian)少工程造(zao)價，又(you)能降低(di)輸電(dian)線(xian)(xian)(xian)路(lu)對沿線(xian)(xian)(xian)環境的影響，滿(man)足(zu)建設“資(zi)源節(jie)約型(xing)、環境友好型(xing)”社(she)會的要求(qiu)。擴徑導線(xian)(xian)(xian)是以滿(man)足(zu)技術條(tiao)件的常規導線(xian)(xian)(xian)規格(ge)為基準，采(cai)取擴大導線(xian)(xian)(xian)外徑技術，在保(bao)證電(dian)暈所要求(qiu)的導線(xian)(xian)(xian)外徑前提下，減(jian)...

750千伏以(yi)上輸(shu)電(dian)線(xian)(xian)(xian)路(lu)運行容(rong)易產生(sheng)電(dian)暈，不(bu)但(dan)消耗大(da)(da)量(liang)功(gong)率，而且其派生(sheng)出的(de)無(wu)線(xian)(xian)(xian)干擾(rao)和可聽噪音嚴重影響生(sheng)態環境。國際上一般(ban)采用(yong)(yong)增(zeng)加導線(xian)(xian)(xian)的(de)外徑和光潔表面來解決。實(shi)際工作中(zhong)，輸(shu)電(dian)線(xian)(xian)(xian)路(lu)所需(xu)的(de)導線(xian)(xian)(xian)截面一般(ban)達不(bu)到限制(zhi)電(dian)暈要求的(de)外徑，只能采用(yong)(yong)加大(da)(da)導線(xian)(xian)(xian)的(de)...