基本的要求是具有很高的比强度(strength-to-weight ratios)。机身的常见材料是铝合金管材和复合材料。
基于6个网页-相关网页
Several other types of wood had similar strength to weight ratios but were not as easily harvested or as plentiful.
其他几个类型的木材也有类似的强度重量比但不容易收获或丰富。
youdao
应用推荐
模块上移
模块下移
不移动