hand-dug caisson operation
... hand-dug caisson construction 手挖沉箱建造工程 hand-dug caisson operation 手挖沉箱工程 hand dug caisson type piles 手挖掘沉箱桩 ...
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短语
手挖沉箱建造工程
hand-dug caisson construction
;
dug caisson construction
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