precast-boxed cofferdam 套箱围堰

template steel boxed cofferdam 模板式钢套箱

lock-type steel boxed cofferdam 锁口式钢套箱围堰

double-wall steel boxed cofferdam 双壁钢吊箱围堰

single-wall steel boxed cofferdam 单壁钢套箱围堰

steel boxed cofferdam 钢吊箱 ; 钢套箱围堰

concrete boxed cofferdam 混凝土套箱

dual-arm boxed cofferdam 双壁套箱围堰

steel boxed cofferdam for 钢吊箱围堰