最終更新日：2022/12/24
The top of the caisson will be at the same level as the bag-work foundation of the pier, and a roundhead, composed of 45-ton granite faced concrete blocks, will be built on it.
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The top of the caisson will be at the same level as the bag-work foundation of the pier, and a roundhead, composed of 45-ton granite faced concrete blocks, will be built on it.
DiQt（ディクト）
無料
★★★★★★★★★★
