grooved rail meaning in Chinese

槽轨
槽形轨
有槽导轨
有槽钢轨

Iron and steel . 70 g grooved rail and its fish plates
钢铁. 70mmg槽型轨和其鱼尾板
Iron and steel . 60 g grooved rail and its fish plates
钢铁. 60mmg槽型轨和其鱼尾板
Iron and steel . 35 g . sf grooved rail and its fish plates
钢铁. 35g sf槽形钢轨及其鱼尾板
Iron and steel . 35 g . tf grooved rail and its fish plates
钢铁. 35g tf槽形钢轨及其鱼尾板
Railway fixed equipment . sawing and drilling of flat - bottom rails of types superior or equal to 26 kg m , of 60 g , 70 g grooved rails and their fischplates
铁路固定设备.大于kg m的g g形平底轨及其鱼尾板的切割和钻孔