而沙丘副梁的前移迅速是格状沙丘的主要运动及其危害形式。
The secondary ridges are main manifestation on the encroach and damage of sand dunes.
根据零件特点设计了一副组合式的冲孔、落料复合模冲压两种产品，介绍了模具结构，论述了组合式纵梁复合模的结构特点。
According to parts character, a pair of assembled punching, blanking compound die punching is designed, die structure is introduced, and assembled carling compound die structure is stated as well.
该系列自卸车选用国际外优良名牌液压件、副车架和车厢纵梁均采用优良锰板焊接和锰板折弯制作而成。
This series dump truck adopts quality hydraulic components, sub-chassis and carriage. Longitudinal beam adopts is made of quality manganese plfore jointing and folding.
该系列自卸车选用国际外优良名牌液压件、副车架和车厢纵梁均采用优良锰板焊接和锰板折弯制作而成。
This series dump truck adopts quality hydraulic components, sub-chassis and carriage. Longitudinal beam adopts is made of quality manganese plfore jointing and folding.
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