slag pinhole

例句：

1. 1. The engineer found a slag pinhole in the wall that needed to be repaired.
   工程师在墙上发现了一个需要修复的渣滓孔洞。
2. 2.The construction crew was working on fixing the slag pinholes in the foundation.
   建筑工人们正在修理地基上的渣滓孔洞。
3. 3.The slag pinholes were causing water leakage and had to be sealed off immediately.
   渣滓孔洞导致漏水，必须立即密封。