gap block

例句：

1. 1.The engineer used a gap block to fix the leaky pipe.
   工程师用一个间隙块来固定漏水的管道。
2. 2.The gap block was designed to prevent water from seeping through.
   这个间隙块的设计是为了防止水渗透。
3. 3.The gap block was removed and the hole was patched with epoxy.
   间隙块被移除，并用环氧树脂修补了洞。