The relay chamber and the reserved pore canals are closed by concrete after the tubular pile reaches the bottom and the relay jacks are taken out.
中继间和预留孔道在管桩到底取出中继千斤顶后由混凝土封闭。
The relay chamber and the reserved pore canals are closed by concrete after the tubular pile reaches the bottom and the relay jacks are taken out.
中继间和预留孔道在管桩到底取出中继千斤顶后由混凝土封闭。
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