back lining

• 腔背,背衬,安全衬砖层

back lining的用法和样例：

例句

1. The thermal conductivity of these materials has increased considerably, demanding materials with high refractoriness and low thermal conductivity as a back-up lining.
   这些材料的热导率增加很多，作为背衬要求材料具有耐火度高和热导率低。
2. Back off the wall with bricks.
   用砖作墙的背衬。