GB/T 342-2017冷拉圆钢丝、方钢丝、六角钢丝尺寸、外形、重量及允许偏差国家标准
英文:Dimension,shape,mass and tolerance of cold-drawn round,square and hexagonal steel wires GB/T 342-2017介绍: 国家标准《冷拉圆钢丝、方...
英文:Dimension,shape,mass and tolerance of cold-drawn round,square and hexagonal steel wires GB/T 342-2017介绍: 国家标准《冷拉圆钢丝、方...