认可后的检验方式：认可后检验方式定为：不定期检验。
The method of aperiodic inspection is used for products after works approval.
使用中汽车排放空气污染物不定期检验办法，由中央主管机关会商有关机关定之。
The central competent authority in consultation with the relevant agencies shall determine regulations for the irregular air pollutant emissions testing of in-use motor vehicles.
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