Certification program — the testing of automobiles at the factory for conformity to federal emissions standards.

证明程序——检测工厂中汽车符合符合联邦排放标准。

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Certification program — the testing of automobiles at the factory for conformity to federal emissions standards.

证明程序——检测工厂中汽车符合符合联邦排放标准。

youdao