The class specified by the domain validator extension must, directly or indirectly, extend the abstract DomainValidator class to be properly used by the validator framework.
域确认器所指定的类必须直接或间接地扩展抽象的domainvalidator类，以让确认器框架适当地使用它。
Equipment such as freezers, refrigerators, etc. that are used to hold components or dietary supplements must be functioning properly and adequately designed.
冷冻机，冰箱保存组分或膳食补充剂等设备必须有适当的功能，设计足够。
Cane probes are used to provide overfill detection where a permanent sensor cannot be properly affixed to a tank or rail car.
在永久性溢出探头无法适当固定在储罐或铁路槽车上的情况下，可用杆式探头来进行过量灌装的检测。
Cane probes are used to provide overfill detection where a permanent sensor cannot be properly affixed to a tank or rail car.
在永久性溢出探头无法适当固定在储罐或铁路槽车上的情况下，可用杆式探头来进行过量灌装的检测。
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