骨性关节炎或退行性关节病可引起老化或反复损伤，导致软骨和骨破坏。
Osteoarthritis or degenerative joint disease can be caused by ageing or repetitive injury and leads to damage of cartilage and bone.
并进行严格的品质监督，产品出厂前均经过反复的超负荷老化实验和检测，严格确保产品质量。
The company has the strict quality system and the products have the overload test to ensure the quality of the products.
由单轴反复拉伸试验分别研究了含键合型防老添加剂和防老剂h的HTPB推进剂破坏能与贮存老化时间的关系。
The relationships between damage energies of HTPB propellants and storage ageing time were investigated by uniaxial repeated tensile test.
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