Quick Reference Guide快速参考指南 Exact Frequency (radiotelegraphy)精确的频率(radiotelegraphy) quick response graphic (US DoD)快速响应的图形(美国国防部) Will you tell me my exact frequency (or that of )? Quality Resource Group, Inc.优质资源集团 Qualitative Reasoning Group, Northwestern University西北大学的定性推理组