non functional hole

例句：

1. 1.The non-functional hole in the circuit board is causing a problem.
   电路板上的这个非功能性孔洞导致了一个问题。
2. 2. The engineer found a non-functional hole in the design that needed to be fixed.
   工程师在设计中发现了一个需要修复的非功能性孔洞。
3. 3.The manufacturer has identified several non-functional holes in the product's specifications.
   制造商已经确定了产品规格中的几个非功能性孔洞。