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材质             外径*壁厚            吨位

45#              480*65                35.62

45#              457*65                20.91

45#              426*45                20.796

45#              351*65                20.594

45#              325*80                21.516

45#              325*90                27.072

45#              325*85                30.31

45#              325*75                31.646