Q8:main material of floorbeam hangers should not be coped or notched. built-up hangers should have solid or perforated web plates or lacing.是什么意思_Q8:main material of floorbeam hangers should not be coped or notched. built-up hangers should have solid or perforated web plates or lacing.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句