4399在线视频免费观看

消防設施工(gong)程(cheng)施工(gong)。（依法須(xu)經批(pi)準(zhun)的項目，經相關(guan)部(bu)門批(pi)準(zhun)后方(fang)可開展經營活動(dong)，具體經營項目以相關(guan)部(bu)門批(pi)準(zhun)文件或許可證為準(zhun)）一般項目：鐵路(lu)運(yun)輸輔助活動(dong)；機械(xie)設備研(yan)發；采礦行(xing)業高效節(jie)能技(ji)術(shu)(shu)研(yan)發；軌道交通(tong)專業設備、關(guan)鍵系統及部(bu)件銷(xiao)(xiao)(xiao)售(shou)；水泥(ni)制(zhi)品銷(xiao)(xiao)(xiao)售(shou)；橡膠(jiao)制(zhi)品銷(xiao)(xiao)(xiao)售(shou)；普通(tong)機械(xie)設備安裝(zhuang)服務；軌道交通(tong)工(gong)程(cheng)機械(xie)及部(bu)件銷(xiao)(xiao)(xiao)售(shou)；特制(zhi)設備銷(xiao)(xiao)(xiao)售(shou)；礦山機械(xie)銷(xiao)(xiao)(xiao)售(shou)；機械(xie)設備銷(xiao)(xiao)(xiao)售(shou)；機械(xie)零件、零部(bu)件銷(xiao)(xiao)(xiao)售(shou)；高性能纖(xian)維及復(fu)合材料(liao)銷(xiao)(xiao)(xiao)售(shou)；新材料(liao)技(ji)術(shu)(shu)研(yan)發。