... , Q345, SS400, etc. size:100*68-630*180mm length:6m/9m/12m steel I beam Tangshan yunfeng industrial and trading Co., ltd is ... the fist level agent of JINXI, LAIWU and CHANGZHI, which ... the strength of H BEAM, I BEAM, ANGLE STEEL AND U CHANNEL STEEL with the competitive price and superb quality due to the ...