核心提示：Cangzhou Hengtai Pipe Fitting Company Ltd.is the specialized production each kind of Stainless steel screwed pipe fitting, Casting fittings,press-fittings, screwed couplings,Pipe fittings, Pipe coupli
推荐简介：低矮沙丘地段的选线要点有哪些？
该种地段，地形起伏不大，沙丘高差一般在10m 以下，移动速度快。路线选线要尽量考虑路中线两侧20m 以内小沙丘为填挖平衡范围。纵断面线应设在小沙丘平均高度二分之一处至沙丘顶部之间。......
Cangzhou Hengtai Pipe Fitting Company Ltd.is the specialized production each kind of Stainless steel screwed pipe fitting, Casting fittings,press-fittings, screwed couplings,Pipe fittings, Pipe couplings,the valve and so _disibledevent="czhongtai.alibaba">czhongtai.alibaba
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