空心钢 meaning in Chinese

hollow steel

Iso hollow steel bars for machining iso specifications
机械加工用空心钢棒
Hollow steel spoke wheel
空心钢辐轮
Hollow section steel fence
空心钢栏
Hollow steel roller
空心钢辊
Test methods for determining the contribution to the fire resistance of structural members - applied protection to concrete filled hollow steel columns
测定结构薄板耐火性的试验方法.防火用混凝土填充的空心钢柱