A.工程和設計Engineering & Design
1.日本及美國工字樑規格尺寸JIS & American Beam size
a.日規H樑、工字樑、槽鐵 等型鋼規格尺寸 下載down load
JIS- H ,I beam、Channel specification and size
b.美國工字樑American wide Flange beam