Qhov sib txawv ntawm Steel Channels thiab Steel Angles
Lawv cov duab yog ib qho ntawm qhov sib txawv tseem ceeb ntawm ob.Cov yeeb nkab steel muaj U-shaped cross-section, thaum lub kaum sab xis steel muaj L-shaped cross-section. Lwm qhov sib txawv tseem ceeb ntawm ob yog qhov uas lawv muab kev txhawb nqa.
