偵察

to investigate a crime / to scout / to reconnoiter / reconnaissance / detection / a scout

to scout / to spy / to detect

short name for Chahar Province 察哈爾|察哈尔[Cha2 ha1 er3]

to examine / to inquire / to observe / to inspect / to look into / obvious / clearly evident

variant of 察[cha2]

a scout / spy

surveillance aircraft / spy plane

detective / investigator / scout / spy

radiation detection

aerosol detector

investigatory

National Reconnaissance Office (of the United States)