仅以沈阳市为例,出租汽车已由最初的几千辆发展到目前的近两万辆。随着时间推移,旧车不断淘汰,新车不断上线运营（出租车一般运营８年）,给出租车计价器检定工作造成了一定的困难,主要原因是:１由于旧车计价器检定手续没有及时注销,而新车已经开始运营,造成一年内拥有同一车牌 In Shenyang alone, for example, taxis have grown from a few thousand to nearly 20,000 at present. With the passage of time, the old car is constantly being eliminated, and the new car keeps going online (the taxi generally operates for 8 years). This has caused some difficulties in the verification of the taxi meter. The main reasons are as follows: 1 Due to the failure of the old car meter verification procedures in time Logout, and the new car has been operating, resulting in a year with the same license plate