The bond between inner plastic lining and steel tubebase metal of that steel plastic clad tube is good, and the service life is long.
所生产的钢塑复合管道其内衬层与钢管基体贴合好、使用寿命长。
2
A thermometer often now, and more often back in the early 1800s, consists of a glass tube up which a column of mercury or alcohol can travel from a reservoir at the base.
现在常见的温度计由一个玻璃管和一个位于底部的贮液槽组成，贮液槽中的水银或酒精沿玻璃管上升形成液柱。
3
An international team of scientists say they've discovered a protected lunar "lava tube" - a deep, giant hole - that might be well suited for a moon colony or a lunar base, CNN reported Sunday.