| 摘要 |
<p>Reducing or absorbing the noise transmission of a component such as a metal sheet, metal pressing or metal casting which is prone to vibration by applying directly or indirectly to at least part of the surface thereof a layer of one or more sheets of asbestos fibre-filled bitumen composition, in laminate form, to an overall thickness of at least 1.5 mm, the weight rates of asbestos to bitumen being in the range 40:60 to 60:</p> |
