4399免费视频

電(dian)子(zi)、光纖、生(sheng)物科(ke)技(ji)、節能環保(bao)、環保(bao)科(ke)技(ji)領域內技(ji)術開發、咨詢(xun)及服務；機(ji)電(dian)產品、不銹鋼制品、儀(yi)表儀(yi)器銷售及服務；建(jian)(jian)(jian)筑勞務服務；建(jian)(jian)(jian)筑機(ji)械、機(ji)電(dian)設(she)(she)備租賃；機(ji)電(dian)安(an)(an)裝(zhuang)(zhuang)工(gong)程(cheng)(cheng)、空氣(qi)凈(jing)化工(gong)程(cheng)(cheng)、建(jian)(jian)(jian)筑裝(zhuang)(zhuang)修(xiu)(xiu)裝(zhuang)(zhuang)飾(shi)工(gong)程(cheng)(cheng)、建(jian)(jian)(jian)筑智(zhi)能化工(gong)程(cheng)(cheng)、消防設(she)(she)施(shi)工(gong)程(cheng)(cheng)、環保(bao)工(gong)程(cheng)(cheng)、管(guan)道工(gong)程(cheng)(cheng)、容器安(an)(an)裝(zhuang)(zhuang)工(gong)程(cheng)(cheng)的設(she)(she)計(ji)、安(an)(an)裝(zhuang)(zhuang)、施(shi)工(gong)、咨詢(xun)；建(jian)(jian)(jian)筑材料(liao)、無塵(chen)無菌凈(jing)化設(she)(she)備及相(xiang)關機(ji)電(dian)、儀(yi)控設(she)(she)備、構配件的生(sheng)產、組裝(zhuang)(zhuang)設(she)(she)計(ji)、咨詢(xun)、調(diao)試、維修(xiu)(xiu)及銷售；建(jian)(jian)(jian)筑工(gong)程(cheng)(cheng)分包；貨(huo)物或技(ji)術進出(chu)口（國家禁止或涉及行政(zheng)審(shen)批(pi)(pi)的貨(huo)物和(he)技(ji)術進出(chu)口除外）（依法須經批(pi)(pi)準的項目(mu)，經相(xiang)關部門批(pi)(pi)準后方可(ke)開展經營活動）