加载自定义词典后，词性出错

利用声学管通过体积速度测量法预测车外发动机噪声
('利用', '需要比'), ('声学管', 'n'), ('通过', 'p'), ('体积速度', 'n'), ('测量法', 'n'), ('预测车', 'n'), ('外发', 'n'), ('动机', 'n'), ('噪声', '副作用')

Reproduce the reported output for the sentence in the issue after loading a custom dictionary. Compare the resulting word segmentation and part-of-speech labels with the dictionary entries; done means the custom dictionary no longer causes incorrect labels. The issue does not name an implementation file or test, so tracing the custom-dictionary loading path is the first step.

Written by the indexing model from the issue text.