slim hole drilling

例句：

1. 1. We need to drill a slim hole through the wall for access to the basement.
   我们需要在墙上钻一个狭窄的孔以便进入地下室。
2. 2. The slim hole was too small to fit the tool in.
   那个狭窄的孔太小，无法放入工具。
3. 3. The engineer used a slim hole drilling technique to create a new passageway.
   工程师采用了一种狭窄孔洞钻探技术来创造一条新的通道。