名称 截面高 截面宽 厚度 TUB20202.0 20 20 2 TUB20202.5 20 20 2.5 TUB25251.5 25 25 1.5 TUB25252.0 25 25 2 TUB25252.5 25 25 2.5 TUB30301.5 30 30 1.5 TUB30302.0 30 30 2 TUB30302.5 30 30 2.5 TUB30302.75 30 30 2.75 TUB40401.5 40 40 1.5 TUB40402.0 40 40 2 TUB40402.5 40 40 2.5 TUB40402.75 40 40 2.75 TUB40403.0 40 40 3 TUB40403.5 40 40 3.5 TUB40403.75 40 40 3.75 TUB40404.0 40 40 4 TUB50501.5 50 50 1.5 TUB50502.0 50