関連ワード:  explain working of transformer class 12    explain construction and working of transformer class 12    explain principle and working of transformer class 12    explain principle construction and working of transformer class 12    explain the working of step up transformer class 12    explain the working of transformer with diagram class 12    explain construction of transformer class 12    explain transformer class 12    explain transformer class 12 physics    explain construction working and uses of a transformer class 12  
結果 : explain working of transformer class 12