機電(dian)(dian)工(gong)(gong)(gong)程(cheng)屬于建筑施工(gong)(gong)(gong)總承包(bao)序列(lie)，該類型企業(ye)(ye)資(zi)質(zhi)分為一級(ji)、二(er)級(ji)、三(san)(san)級(ji)三(san)(san)個等級(ji)。機電(dian)(dian)工(gong)(gong)(gong)程(cheng)資(zi)質(zhi)新辦(ban)企業(ye)(ye)，必須從三(san)(san)級(ji)開始辦(ban)理(li)申(shen)請，若想辦(ban)理(li)更高級(ji)別，只有業(ye)(ye)績符合(he)之后方可辦(ban)理(li)機電(dian)(dian)工(gong)(gong)(gong)程(cheng)資(zi)質(zhi)升級(ji)。機電(dian)(dian)工(gong)(gong)(gong)程(cheng)是(shi)指未列(lie)入港口(kou)與航(hang)道、水(shui)利水(shui)電(dian)(dian)、電(dian)(dian)力、礦山(shan)、冶金、石油化工(gong)(gong)(gong)、通信工(gong)(gong)(gong)程(cheng)的(de)(de)機械、電(dian)(dian)子、輕工(gong)(gong)(gong)、紡織、航(hang)天航(hang)空(kong)、船舶、兵器等其他工(gong)(gong)(gong)業(ye)(ye)工(gong)(gong)(gong)程(cheng)的(de)(de)機電(dian)(dian)安裝工(gong)(gong)(gong)程(cheng)。資(zi)質(zhi)新辦(ban)一般情(qing)況下資(zi)質(zhi)證書有效期(qi)是(shi)五年(nian)，在快要到(dao)期(qi)的(de)(de)時候企業(ye)(ye)就要準備資(zi)質(zhi)延續資(zi)料(liao)，一旦過期(qi)，資(zi)質(zhi)就自動注(zhu)銷。