直径部件编号规格分钟断裂强度每 100′约重7/16SY4362506商业14,90035.61/2SY5062506商业19,30045.89/16SY5662506商业24,30059.05/8SY6262506商业30,10071.53/4SY7562506商业42,900105.27/8SY8762506商业58,0001431SY1062506商业75,200187