| 释义 |
〔lagging〕Insulation used to prevent heat diffusion, as from a steam pipe.绝热材料:用来防止热量散失的绝热材料,如从蒸汽输送管上〔perlite〕A natural volcanic glass similar to obsidian but having distinctive concentric cracks and a relatively high water content. In a fluffy heat-expanded form perlite is used as a lightweight aggregate, in fire-resistant insulation, and in soil for potted plants.珍珠岩:一种天然火山玻璃岩,类似于黑曜岩,但它有清晰的同轴裂纹和相对高的含水量。轻的热膨胀形珍珠岩可用作轻型建材,也可用于绝热材料和盆栽植物的土壤中 |