中B货架Medium type(B) rack

以蝴蝶孔结构锁紧，依靠货物自重进行锁紧，承载重量比中A货架大。装拆方便，主、辅架可无限连接，增加货架牢固，节约投入。层板可以以75mm为单位上下任意调节。层面可铺钢层板，亦可铺木板等其它板类。货架由柱片、横梁、层板、安全销和塑料底脚组成。

Locked by butterfly hole structure and cargo dead weight,larger bearing capacity than type(A);easy assembly and disassembly;limitless connection to main auxiliary rack;enhanced rack robustness;saved investment;layer plates arbitrarily adjustable at 75mm steps;steel,wood and other layer platescan be used;Rack consisting of column disc,crossbeams,layer plates,safety pins and plastic footing.