短語(yǔ)詞組短語(yǔ)composite channel steel beam 組合槽鋼梁channel steel beam 槽鋼梁channel l beam 槽形梁inverted -channel shaped beam 反槽形板wide channel beam 槽型寬梁channel simply supported beam 槽形簡(jiǎn)支梁Steel Channel Beam 槽鋼梁thin walled channel beam 輕型薄壁槽鋼channel steel middle beam 槽鋼腰梁 返回 channel beam