alternation current circuit {= AC circuit}

earth circuit [= earth return circuit]

enlarged circuit and compensation circuit

single filip-flop circuit (sff circuit)

trip circuit and closing circuit

1-step add-compare-select

a Legco select committee

ability to select

accounting select

ACS add-compare-select unit

ACS(Add-Compare-Select)

ACS(add-compare-select)unit

Add-Compare-Select

add-compare-select unit

alternative select

applicability select

automatically select

Auto-select

bank select