1公定力 　　是指农机行政执法行为一经作出，就具有法定效力。这种公定力是靠国家法律来保障的，行政管理相对人都必须服从，除非由有权机关经法定程序变更或撤消。公定力是具体行政行为不停止执行的依据。这是因为，农机行政执法主体是代表国家公共利益行使农机行政执法? 1  public power refers to agricultural administrative law enforcement acts once made, it has the legal effect. Such official power is guaranteed by the laws of the country, and the counterparts in the administration must obey unless the competent organ changes or withdraws through legal procedures. Official force is the basis for specific administrative actions not to be stopped. This is because, the main body of agricultural law enforcement is to represent the national public interest in the implementation of agricultural machinery law enforcement?