nd tier main transportation
... 二程接驳 2nd Tier Feeder Service 二级干线 2nd Tier Main Transportation 二级中转 2nd Tier Transfer ...
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但是与国家和省级干线公路不同，县乡公路主要由技术等级在二级和二级以下的公路所构成。
However, the rural road is different from main roads of state or province level in that it is mainly composed of roads whose technical degree is of or under the second degree.
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