Electricity meters : part - 4 : specification for class 3 var - hour meters
Electricity meters : part - 4 : specification for class 3 var - hour meters
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- London BSI 1986
- 8 p.
- BSI 5685 : part - 4 : 1986 .
DBSI 5685 : part - 4 : 1986
DBSI 5685 : part - 4 : 1986