lagging
noun
- thermal insulation for wrapping around pipes, boilers, etc.
- a wood framework to support an arch while it is being built
- Mining planks or timber used to prevent rocks from falling in a shaft or drift
See lagging in American Heritage Dictionary 4
(lăgˈĭng)
noun- Insulation used to prevent heat diffusion, as from a steam pipe.
- A wooden frame built especially to support the sides of an arch until the keystone is positioned.
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