金属顶梁DJB600/470
金属长梁DFB1600/300
DFB金属长梁DFB2600..
DFB金属长梁DFB2400..
DFB金属长梁DFB2000..
DFB金属长梁DFB2200..
DFB金属长梁DFB1800..