該型蘇聯使用較早。1948年引進時,其前後臂都用鋼板梁,吊重有45噸和80噸兩種。50年代,將雙臂改為構架,吊重發展到130噸。這類架橋機不能自行,需用機車頂推。其前臂用來吊梁,後臂吊平衡重,前後臂都不能在水平麵內擺動。架橋時,常須用特製80噸小平車將梁片運到架橋機前臂的吊鉤之下(稱為“喂梁”)才能起吊;weishitiaochezuoyefangbian,meixuzaiqiaotoupushechaxian。jiaqiaojijiangliangdiaoqihou,zhouzhongzengda,erqiaotoudexinjianludibijiaosongruan,yinci,duijiaqiaojidiaoliangxingchediduanbixucaiqujiagucuoshi,ruyongzhongcheyadao,jiachaguizhendeng。fenpianjialiangshi,xianjiangliangpianluozaiqiaozhouxianshang,zaixiangliangcehengyi**位;也可采取撥道架梁的方法(即預先將架橋機下軌道撥向一側,讓吊臂偏離橋軸線,使梁片恰好落到設計位置)。bodaojialiangkejieshengjiaqiaoshijian,danyingduiyijialiangkuadepianxinshoulijiqidaochacaobandeqiangdu,yijiluoliangshipinghengzhongshifounengtongshiluozaizaiyunpinghengzhongdecheliangshangdeng,zuoxiangxijiansuan。