There are times when you should request copies of your records: 1  Permanent Change of Station. 2  Deploying. 3  Retiring.
0. EXPERT ANSWER. Double coincidence of wants refers to a situation in a barter system where the goods or services offered by a seller are exactly the same as that required by a buyer and vice versa.
double vision meaning, double vision definition | English Cobuild dictionary. double vision. If someone is suffering from double vision, they see a single object as two objects, for example because they are ill or have drunk too much alcohol. 1 adj You use double to indicate that something includes or is made of two things of the same kind.