曲面圖(tu)形可看成動線運動時的(de)軌跡，形成曲面的(de)動線稱(cheng)為母線。比(bi)如(ru)圓錐的(de)主視圖(tu)是一(yi)個等腰(yao)三角(jiao)形，這個三角(jiao)形的(de)腰(yao)就是圓錐母線。

控(kong)制母(mu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)運(yun)(yun)動(dong)(dong)的(de)(de)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)或(huo)面(mian)，稱為(wei)(wei)導(dao)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)或(huo)導(dao)面(mian)，母(mu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)在曲(qu)面(mian)上任一位(wei)置(zhi)，稱為(wei)(wei)素(su)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)，鋁合金密集母(mu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)，線(xian)(xian)(xian)(xian)(xian)(xian)(xian)低壓母(mu)曲(qu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)AB為(wei)(wei)導(dao)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)，直線(xian)(xian)(xian)(xian)(xian)(xian)(xian)SB為(wei)(wei)母(mu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)，SB運(yun)(yun)動(dong)(dong)的(de)(de)各(ge)個位(wei)置(zhi)為(wei)(wei)素(su)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)。母(mu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)為(wei)(wei)直線(xian)(xian)(xian)(xian)(xian)(xian)(xian)時(shi)所形(xing)成的(de)(de)曲(qu)面(mian)中心(xin)稱為(wei)(wei)母(mu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)作規(gui)則(ze)(ze)運(yun)(yun)動(dong)(dong)時(shi)所形(xing)成的(de)(de)曲(qu)面(mian)稱為(wei)(wei)規(gui)則(ze)(ze)曲(qu)面(mian)。控(kong)制母(mu)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)運(yun)(yun)動(dong)(dong)的(de)(de)備寒雄牛(niu)點線(xian)(xian)(xian)(xian)(xian)(xian)(xian)面(mian)稱之為(wei)(wei)導(dao)線(xian)(xian)(xian)(xian)(xian)(xian)(xian)。

一個開關(guan)在兩排(pai)并列的(de)母(mu)(mu)(mu)(mu)(mu)線上都(dou)有隔離開關(guan)的(de)，則這兩排(pai)母(mu)(mu)(mu)(mu)(mu)線的(de)連(lian)接開關(guan)，鋁合金(jin)密集母(mu)(mu)(mu)(mu)(mu)線電話，就是母(mu)(mu)(mu)(mu)(mu)聯(lian)開關(guan)。比如東西母(mu)(mu)(mu)(mu)(mu)或(huo)南北母(mu)(mu)(mu)(mu)(mu)的(de)連(lian)接開關(guan)。母(mu)(mu)(mu)(mu)(mu)線槽和母(mu)(mu)(mu)(mu)(mu)線

而母(mu)(mu)線(xian)（我們且稱為單母(mu)(mu)分(fen)段），中間的(de)(de)連接開關(guan)就是 母(mu)(mu)線(xian)的(de)(de)分(fen)段開關(guan)。任(ren)何一條線(xian)路只能接到I段或(huo)II段母(mu)(mu)線(xian)上。

優點(dian)：母線(xian)分段(duan)后，對重要用戶，可以(yi)從不同(tong)段(duan)供電(dian)。另(ling)外，當(dang)一段(duan)母線(xian)發生故障時(shi)，分段(duan)斷路器能夠自動將(jiang)故障切除(chu)，保證正常段(duan)母線(xian)不間斷供電(dian)。

缺點：當母線(xian)故障(zhang)時(shi)，該母線(xian)上的回路都要(yao)停電，而(er)且擴(kuo)建時(shi)需(xu)要(yao)向兩個方向均(jun)衡擴(kuo)建。

缺點：增(zeng)加(jia)了一(yi)組母線，每一(yi)回路增(zeng)加(jia)一(yi)組母線隔(ge)離開關，鋁合金(jin)密集(ji)母線生產(chan)商(shang)，增(zeng)加(jia)了投資，操作復雜，占地面(mian)積增(zeng)加(jia)。

是電(dian)(dian)(dian)力配電(dian)(dian)(dian)設備上(shang)的(de)導(dao)電(dian)(dian)(dian)材料(liao)名稱，材質扁(bian)銅（相(xiang)(xiang)當(dang)于電(dian)(dian)(dian)線），沒有絕緣層(ceng)，外面刷有表示相(xiang)(xiang)序的(de)顏色油漆，主要用于室內變壓器(qi)到配電(dian)(dian)(dian)柜(ju)再到電(dian)(dian)(dian)源總閘然(ran)后連(lian)接到各分(fen)閘。

母線(xian)(xian)(xian)：是中(zhong)間(jian)可(ke)以(yi)接(jie)出(chu)分支線(xian)(xian)(xian)的(de)，在化(hua)工廠(chang)使(shi)用的(de)過程中(zhong)線(xian)(xian)(xian)路接(jie)出(chu)分線(xian)(xian)(xian)更”靈活”些所采用的(de)防護套(tao)聚烯烴高聚物高溫散(san)發出(chu)的(de)氣味，鋁(lv)合金密集母線(xian)(xian)(xian)廠(chang)，要知(zhi)道化(hua)工廠(chang)內及附近的(de)空氣可(ke)能有(you)腐(fu)(fu)蝕性，所以(yi)要選擇防腐(fu)(fu)蝕性強的(de)管型(xing)母線(xian)(xian)(xian)。

電(dian)纜(lan)：不能在中間破口接出分(fen)支線，多(duo)數選用電(dian)纜(lan)終(zhong)端頭來連接設(she)備(bei)，在連接設(she)備(bei)的時候特別是空間狹小的情況下更容易(yi)造成大量的電(dian)纜(lan)材料浪費。