active duty active service
现役;
Methods for chemical analysis of magnesium powders and aluminium-magnesium alloy powders--The gasometric method for the determination of active magnesium and active aluminium-magnesium contents
镁粉和铝镁合金粉化学分析方法 气体容量法测定活性镁及活性铝镁量;
Active-Active redundancy
主动冗余;
fiber active connector optical fiber active connector
光纤有源连接器;
fiber active connector optical fiber active connector
光纤有源连接器;