Rsitu Hollow Floor Framing

• 薄壁空心管

Rsitu Hollow Floor Framing的用法和样例：

例句

1. The stressmeter consists of a short solid or thick hollow cylinder of birefringent material.
   应力计由双折射材料制成的实心短圆柱体或厚壁空心短圆柱体构成。