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原標題：国产乡下三级_三级全黄

　　中??(zhong)國??(guo)工??(gong)程??(cheng)院??(yuan)院??(yuan)士??(shi)、中??(zhong)國??(guo)鐵??(tie)道??(dao)學(xué)??(xue)會?(hui)理??(li)事??(shi)長??(chang)盧??(lu)春??(chun)房?(fang)指??(zhi)出?(chu)??，縱?(zong)觀??(guan)全??(quan)球??(qiu)鐵??(tie)路?(lu)調(diào)??(tiao)車??(che)技??(ji)術(shù)?(shu)的??(de)發(fā)??(fa)展??(zhan)歷??(li)程??(cheng)??，從??(cong)最??(zui)初?(chu)的??(de)手??(shou)工??(gong)操??(cao)作??(zuo)到??(dao)機??(ji)械??(xie)化??(hua)作??(zuo)業(yè)??(ye)??，再??(zai)到?(dao)自??(zi)動??(dong)化??(hua)控??(kong)制??(zhi)??，雖?(sui)取??(qu)得??(de)顯??(xian)著??(zhu)進?(jin)步??(bu)??，但??(dan)仍??(reng)普??(pu)遍??(bian)存??(cun)在??(zai)軟??(ruan)硬??(ying)件??(jian)成??(cheng)本??(ben)高??(gao)、系??(xi)統(tǒng)??(tong)管??(guan)理??(li)復(fù)??(fu)雜??(za)、維??(wei)護??(hu)難??(nan)度??(du)大??(da)等??(deng)現(xiàn)??(xian)實??(shi)問秘(wen)題??(ti)??。??　　中?(zhong)國??(guo)工?(gong)程??(cheng)院??(yuan)院??(yuan)士??(shi)、中??(zhong)國??(guo)鐵??(tie)道??(dao)學(xué)??(xue)會??(hui)理??(li)事??(shi)長??(chang)盧?(lu)春??(chun)房??(fang)指??(zhi)出??(chu)??，縱??(zong)觀?(guan)全??(quan)球??(qiu)鐵??(tie)路??(lu)調(diào)??(tiao)車??(che)技??(ji)術(shù)??(shu)的??(de)發(fā)祝(fa)展??(zhan)歷??(li)程??(cheng)??，從?(cong)最??(zui)初??(chu)的??(de)手??(shou)工??(gong)操??(cao)作??(zuo)到??(dao)機??(ji)械??(xie)化??(hua)作??(zuo)業(yè)??(ye)??，再??(zai)到??(dao)自??(zi)動??(dong)化?(hua)控??(kong)制?(zhi)??，雖?(sui)取??(qu)得??(de)顯??(xian)著??(zhu)進??(jin)步??(bu)??，但??(dan)仍??(reng)普??(pu)遍??(bian)存??(cun)在??(zai)軟??(ruan)硬??(ying)件??(jian)成??(cheng)本??(ben)高??(gao)、系??(xi)統(tǒng)??(tong)管??(guan)理??(li)復(fù)??(fu)雜??(za)、維??(wei)護??(hu)難??(nan)度??(du)大??(da)等??(deng)現(xiàn)??(xian)實??(shi)問??(wen)題??(ti)??。??。