physical foam insulation 物理发泡绝缘挤塑
Aside from the aesthetic differences, the only physical difference was an additional piece of foam inside the cheaper HD555 headphones, blocking about 50% of the outside-facing vents.
撇开美学的差别，唯一的物理差别就是在较便宜的HD 555耳机内部多了一块泡沫，阻挡了约50%的外向通风孔。
The feasibility of the foam rubber surface processing by physical vapor deposit coating was discussed.
并探讨了物理气相沉积涂层法对泡沫橡胶表面进行处理的可行性。
The changes in mechanical and physical properties and chemical structure of polyvinyl formal (PVFM) foam caused by hygrothermal ageing tests were studied by means of IR and other measuring methods.
用红外光谱和其他测试方法对聚乙烯醇缩甲醛(PVFM)泡沫材料湿热老化前后力学性能、物理性能和化学结构的变化进行了研究。
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