Metals such as aluminum can also form foams -- and because of their greater rigidity, they could, in theory, dissipate as much energy as a polymer foam in a much thinner layer.
It mainly has two parts as follows: theory research of foamed drilling fluids, and practice achievements in foam and foamed drilling technology.
论文主要包括两大部分：一是泡沫流体理论研究，二是泡沫和泡沫钻进技术的实践成果。
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The paper applies the enterprise management theory to study the competition strategy and the operation management of Irradiation Crosslinked Polyethylene Foam (IXPE) for HK Corporation.