... 国家干线公路(国道)national trunk highway 省级干线公路(国道)provincial trunk highway 县公路(县道)county road ...
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省级干线公路
Provincial trunk highways
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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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