Structures are always subjected to various adverse factors during its long-time service, such as fatigue, environmental corrosion, material aging, etc.
在结构长期服役期间，疲劳、环境腐蚀和材料老化等因素的作用会引起结构损伤的累积。
For the reasons of design, construction and material aging, plate type elastomeric pad used on bridge would appear unusual deformation, cracks, glide etc.
板式橡胶支座在使用过程中，由于设计和施工的原因以及材料老化的原因，易发生异常变形、开裂、滑动支座不能滑动等病害。
Reflector plate: High-quality composite material, aging-resistant.
反光板：优质复合材料，抗老化。
Reflector plate: High-quality composite material, aging-resistant.
反光板：优质复合材料，抗老化。
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