Words to Describe transformers

How transformers often is described ("________ transformers")

• intermediate
• matching
• modern
• rectifier
• electronic
• smaller
• secondary
• insulated
• core
• most
• type
• toroidal
• pulse
• tapped
• wave
• outdoor
• changing
• potential
• differential
• voltage
• small
• stationary
• conventional
• suitable
• ordinary
• main
• variable
• identical
• down
• commercial
• polyphase
• auxiliary
• constant
• cooled
• practical
• designed
• filled
• tuned
• immersed
• dry
• expensive
• linear
• delta
• circuit
• electrical
• line
• phase
• instrument
• connected
• protective
• separate
• larger
• static
• available
• current
• typical
• large
• audio
• cored
• efficient
• miniature
• special
• rotary
• individual
• standard
• ideal
• magnetic
• electric