pinpoint gate

例句：

1. 1. The engineer pinpointed the problem at the source of the leak.
   工程师准确找到了泄漏源头的问题。
2. 2.The scientist used a pinpoint gate to control the flow of gases.
   科学家使用一个精确的闸门来控制气体的流量。
3. 3.The construction workers were able to pinpoint the exact location of the fault in the bridge.
   建筑工人能够准确地找到桥梁故障的具体位置。