commercial steel的用法和樣例：
例句
- The roof is formed from standard steel sections and recyclable pre-cast concrete units.
屋頂是形成從標準型鋼可回收和預制混凝土組件。 - This paper presents an automatic stowing,packing and gathering system for a section steel tandem rolling line.
介紹一種用于精整工藝的自動(dòng)化型鋼碼垛包裝收集系統。 - There parts are blanked out of strip steel.
這些零件是用條鋼沖壓出來(lái)的。
