hollow steel section

基本解释

In order to enhance the service hfe of hollow steel for rock drill stem, the odd number side section shape hollow steel has been designed.
为了提高凿岩钎杆用中空钢的使用寿命，设计了奇数边截面形状的中空钢。
The achievements in this paper may be referenced for the fire protection design of practical engineering with concrete filled steel rectangular hollow section columns.
本文的研究成果可为有关矩形钢管混凝土工程进行抗火设计时提供参考。
She also tested a more economical "three box" hollow section and a thicker section WPC that allowed studs to be inserted into the sill plate and steel rods to be used as holdowns.
她还测试了一种更经济的WPC“三腔”空心截面和一个厚截面，可将螺栓插入到地基木和钢杆中作为支撑。