Mugihe cyo gushakisha ibikoresho byubaka byuzuye, umuntu ntashobora kwirengagiza akamaro k'ibiti bishyushye bya H - ibicuruzwa byinshi kandi byizewe bikozwe mubyuma bya karubone. Ibi biti, bizwi kandi nka I-beam, bimaze igihe kinini bitoneshwa mubikorwa byubwubatsi fo ...
Soma byinshi