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英国材料工程研究实验室(BERL)和英国流体力学研究集团(BHRG)对密封寿命预测课题进行联合的研究。1989～1991年为第一阶段的研究,主要研究典型系列的弹性体的各种性质,如高压渗透性、流体在橡胶内的扩散、溶胀、硬度的变化及对内部结构的影响、应
The UK Materials Engineering Research Laboratory (BERL) and the British Fluid Mechanics Research Group (BHRG) conducted a joint study on the prediction of seal life expectancy. The first phase of the study, from 1989 to 1991, focused on the various properties of a typical series of elastomers, such as high pressure permeability, fluid diffusion within the rubber, swelling, hardness changes and the effect on the internal structure,