tubular specimens

例句：

1. 1.The pipe was made of tubular steel.
   那根管子是用管状钢制成的。
2. 2.The cylinder is a tubular shape.
   这个圆柱体是圆筒形状的。
3. 3. Thetube was made from tubular metal.
   那个管子是由管状金属制成的。