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The road is not sealed with premix and is only a gravel road since its completion few years back.

該段道路在幾年前已完成并啟用后一直都沒有鋪上瀝青国产yyzz，迄今還是砂石的路面啪啪一级视频。

China's "Highway Engineering Technical Standards" will be divided into high-level road according to technical quality, sub-senior, middle and low-level four kinds, all kinds of road surface types are as follows: Senior Pavement - asphalt concrete pavement, cement concrete pavement, plant mix asphalt crushed stone pavement, stone pavement of rocks or neat; second high-level road surface - asphalt penetration-style pieces, gravel road, asphalt road debris, gravel road, asphalt road surface, Treatment, semi-neat stone pavement; middle road - broken, gravel (size distribution, or clay-bound) road surface, irregular stone pavement, other granular surface; low road - aggregates stabilized soil surface, and other local materials, reinforcement or improvement of soil surface.

中國《公路工程技術(shù)標(biāo)準(zhǔn)》將路面按技術(shù)品質(zhì)分為高級、次高級特黄a大片免费视频、中級和低級四種日韩欧美人妻综合在线，各種路面的面層類型如下：高級路面——瀝青混凝土路面，水泥混凝土路面国产zaixian自拍，廠拌瀝青碎石路面国产超碰人人做人人爱，整齊石塊或條石路面；次高級路面——瀝青貫入式碎国产91Av九色、礫石路面18岁不能看的网址，路拌瀝青碎、礫石路面1024看片无码人妻日韩，瀝青表面處治路面国产A片123区，半整齊石塊路面；中級路面——碎后λ式吃奶动态后λ式视频、礫石路面国产黄色网站视频不收费的，不整齊石塊路面，其他粒料路面免费无码啪啪视频强奸暴力强奸；低級路面——粒料加固土路面美欧男女乱婬视频，其他當(dāng)?shù)夭牧霞庸袒蚋纳仆谅访妗?/p>

Gravel road, but also present in some places villagers muddy road earthworks sub-rule.

砂石路，也是現(xiàn)今有些地方村民治爛泥路的土方子一级毛片一级毛片一级毛片大全。

gravel road：砂石路

freeway 高速公路 | gravel road 砂石路 | highway 公路

gravel road：礫石路

bowl 試車場 | gravel road 礫石路 | braking system 制動系統(tǒng)

gravel road：碎石路

Brittleness 脆性;脆度 | Gravel Road 碎石路 | Broken Stone Surface 碎石路面