| <?xml version="1.0" encoding="UTF-8"?> | 
| <CustomField xmlns="http://soap.sforce.com/2006/04/metadata"> | 
|     <fullName>PeriodOfUse_Old_F__c</fullName> | 
|     <externalId>false</externalId> | 
|     <formula>IF(NOT(ISBLANK(RNDAssert__r.Consumable_Guaranteen_end_old__c)),RNDAssert__r.Consumable_Guaranteen_end_old__c,RNDAssert__r.Consumable_Guaranteen_end__c)</formula> | 
|     <formulaTreatBlanksAs>BlankAsZero</formulaTreatBlanksAs> | 
|     <label>使用期限(修改前)</label> | 
|     <required>false</required> | 
|     <trackTrending>false</trackTrending> | 
|     <type>Date</type> | 
| </CustomField> |