filling-in ring

例句：

1. 1. The filling-in ring is a crucial part of the construction process.
   填充环是建筑过程中至关重要的一部分。
2. 2.The engineer carefully filled in the gaps in the design with reinforced concrete.
   工程师仔细地用钢筋混凝土填补了设计中的空隙。
3. 3. The filling-in ring was installed to prevent water seepage into the foundation.
   填充环被安装来防止水分渗透到地基中。