A longitudinal concrete cofferdam was demolished by way of underwater controlled blasting.

利用水下控制爆破方法拆除了大源渡河中的混凝土纵向围堰。

youdao

A longitudinal concrete cofferdam was demolished by way of underwater controlled blasting.

利用水下控制爆破方法拆除了大源渡河中的混凝土纵向围堰。

youdao