- spot check
- 抽查: conduct a selective examinat ...
- 抽样: sample; sampling; specimen; ...
- 检查: check up; inspect; examine; ...
- 抽样检查: checking by sampling; curtailed inspection; picktest; random examination; random inspection; sample survey; sampling check; samplinginspection; spot check; spot examination; spotcheck; tightened sampling inspection
- 变量抽样检查: sampling inspection by variables
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