2.5mm不锈钢钢丝绳304,316材质，7*19,7*37,7*7重量计算公式:举例1：7X7-2.5mm M=2.5^2*0.387=2.42(kg/100m)举例2：7X19-2.5mm M=2.5^2*0.418=2.61(kg/100m)举例3：7X7-2.5mm M=2.5^2*0.418=2.61(kg/100m)
