介绍迷宫式油封的胶料配方设计和试制，在耐油老化和装车运行考验中，其密封性好、耐老化、 寿命长的特点，使橡胶迷宫式货车轴承密封装置的优越性得到较好地体现。
It introduces formulation design of the compound and development of labyrinth oil seal. The sealing property, ageing resistance arid service life in oil resistance and fitting test are also related.
矿物油还会减缓皮肤运行功能，影响正常的细胞生长，造成肌肤的提早老化。
It also slows down skin function and normal cell development, resulting in premature aging of the skin.
试验结果表明，这些参数与油的热老化程度有很大的关系。
The experimental results show that there is a close relationship between these parameters and the degree of thermal aging.
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