double wall pier 双壁墩

Double-Limb Pier 双肢墩

double-column pier 双柱式桥墩

double column pier 双柱桥墩

double cylinder pier 双柱桥墩

double thin wall pier 双薄壁墩

double thin-wall pier 双薄壁墩

double-thin walled pier 双薄壁墩

double thin-walled pier 双薄壁墩

double-track bridge pier 双线桥墩