Insulators and fittings for overhead lines. Metal fittings. Galvanized square tubes (TG).

架空线路用绝缘子和配件。金属配件。镀锌方管(TG)。

youdao

The columns in four of the framed specimens used circular steel tubes while the rest two were square tubes.

框架中的柱有四个使用圆形钢管，而剩下的两个是方形管。

youdao

The effects of longitudinal and transverse stiffeners on quasi-static crushing of stiffened square tubes are studied with the nonlinear finite element method.

本文用非线性有限元方法研究了准静态条件下纵向和横向加强筋对加筋方形管压溃破坏的影响。

youdao

And in one of the neatest art installations we've seen this week, Leo Villareal announced plans to install a 30-foot-tall "Buckyball" sculpture that's made up of 180 glowing LED tubes in New York City's Madison Square Park later this year.

ENGADGET: Inhabitat's Week in Green: 30-foot 'Buckyball', Olympic stadium Lego replica and the 'Mantabot'

Below that is a row of four test tubes, marked with a circle, an X, a square and a plus sign.

FORBES: Magazine Article