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              SSI electrical power supply units | 
              Power sources. Primary cells and secondary cells. Dimensions | 
              Primary cells and batteries. Principal parameters and dimensions | 
        
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              Current sources primary. Control methods of electric parameters | 
              Primary cells and batteries. Marking, packing, transporting and storing | 
              Lead-acid starter batteries. Part 1. General requirements and test methods | 
        
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              Primary batteries. Part 6. Environmental safety. General requirements | 
              Chemical sources of current. Terms and definitions | 
              Primary batteries. Part 1. General | 
        
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              Primary batteries. Part 1. General requirements | 
              Primary batteries. Part 2. Physical and electrical specifications | 
              Primary batteries. Part 2. Physical and electrical characteristics |