glass tube protector的用法和樣例：
例句
- Every fiber-optic cable used for networking consists of two glass fibers encased in separate sheaths.
使用來連網的每個光纖電纜是由包裝在分開的保護套內的二條玻璃纖維組成。 - Soil volumetric water content was measured by employing the metallic tube of the tensiometer as an antenna, whose radiating impedance varied as soil water content.
將張力計中的一段金屬保護套管作為天線，利用其輻射阻抗隨著土壤含水率變化的規律來測量土壤容積含水率。
