钢木组合屋架、三铰拱轻型钢屋架、现浇楼梯板、楼梯梁图纸.dwg
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钢木组合屋架、三铰拱轻型钢屋架、现浇楼梯板、楼梯梁 Combination steel and wood roof trusses, three-hinged arch of light steel roof trusses, cast stairs, stair beam
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钢木组合屋架、三铰拱轻型钢屋架、现浇楼梯板、楼梯梁 Combination steel and wood roof trusses, three-hinged arch of light steel roof trusses, cast stairs, stair beam