About Zhang Wanli
About 北京城建北方集団有限公司,北京 101301
About Wang Zhenxing
About 北京城建北方集団有限公司,北京 101301
About Zhou Yulong
About 北京城建北方集団有限公司,北京 101301
About Wang Deguo
About 北京城建北方集団有限公司,北京 101301
About Wang Weixin
About 北京城建北方集団有限公司,北京 101301
About Liu Qingjiang
About 北京城建北方集団有限公司,北京 101301
About Zhang Youzhen
About 北京城建北方集団有限公司,北京 101301
About Shigong Jishu
About die steel
About environmental conservation
About construction method
About H shaped steel
About reuse
About recycling
About Energy efficient technologies
About bar
About metal bar
About utilization
About saving
About energy saving
About Metal structures
About Structures using other structural materials
About H型鋼
About 改造
About リサイクル
About 工法