Pavement surface, directly subject to tyre loading and weathering, introduces therefore a few more requirements for both composing aggregates and final asphalt.
路面表层直接与自然环境接触并经受车辆荷载作用，对混合料及其组成集料都有更多性能上的要求。
Under the production center, there are final-period video and audio editing, special effect composing and technique supporting centers.
下设后期音视频剪接、技合成和技术服务中心。
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