371 typical structural steel shapes include beams, channels, angles and tees 典型的結(jié)構(gòu)型鋼包括工字鋼、槽鋼、角鋼和丁字鋼。
371 typical structural steel shapes include beams, channels, angles and tees 典型的確是的結(jié)構(gòu)型鋼包括工字鋼、槽鋼、角鋼和丁字鋼。
specification for carbon and high-strength low-alloy structural steel shapes, plates, and bars and quenched-and-tempered alloy structural steel plates for bridges 橋梁用碳素鋼和高強(qiáng)度低合金結(jié)構(gòu)型鋼鋼板鋼棒及調(diào)質(zhì)合金結(jié)構(gòu)鋼棒規(guī)范