The low height chest beam of cohesionless PPC possesses the superiority such as construction handy and economizing material et al.
无粘结部分预应力混凝土低高度箱梁具有施工简便、节省材料等优越性。
The low height chest beam of cohesionless PPC possesses the superiority such as construction handy and economizing material et al.
无粘结部分预应力混凝土低高度箱梁具有施工简便、节省材料等优越性。
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