carrier free是什么意思

用法例句

The characters of no-load member in closed complex structure and the reason of high-rigid of diagonal partition wall have been studied.

分析了组合封闭薄壁结构中无载构件的特性和对角筋板具有优良扭转刚度的原理,提出以结构的振型为依据,采用适当的筋板结构型式,可以提高结构的动刚度。