HSK 7-9
排查
páichá动
to inspect; to run through a checklist; to take stock; to audit
技术人员连夜排查故障原因。
Jìshùrényuán liányè páichá gùzhàng yuányīn.
The technicians worked through the night to identify the cause of the fault.
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Appears across levels (7-9) in the HSK 3.0 word list.