200*200,중고빔,우연철강,H형강,토목빔,건축빔,받침대,휀스용,담장요빔,

 200*200 중고빔,

                              

400*200

294*200

http://hapsteel.co.kr

https://play.google.com/store/apps/details?id=appinventor.ai_hapsteel.qw

https://www.youtube.com/channel/UCEQuQ00G1AMuDgxRhndpRAQ