SWD may refer to:
An ultrasonic motor is a type of electric motor powered by the ultrasonic vibration of a component, the stator, placed against another component, the rotor or slider depending on the scheme of operation (rotation or linear translation). Ultrasonic motors differ from piezoelectric actuators in several ways, though both typically use some form of piezoelectric material, most often lead zirconate titanate and occasionally lithium niobate or other single-crystal materials. The most obvious difference is the use of resonance to amplify the vibration of the stator in contact with the rotor in ultrasonic motors. Ultrasonic motors also offer arbitrarily large rotation or sliding distances, while piezoelectric actuators are limited by the static strain that may be induced in the piezoelectric element.
One common application of ultrasonic motors is in camera lenses where they are used to move lens elements as part of the auto-focus system. Ultrasonic motors replace the noisier and often slower micro-motor in this application.
Love is like oxygen
You get too much you get too high
Not enough and you're gonna die
Love gets you high
Love is like oxygen
. . .
Time on my side
I got it all
I've heard that pride
Always comes before a fall
There's a rumour goin' round the town
That you don't want me around
I can't shake off my city blues
Every way I turn I lose
Love is like oxygen
. . .
Love is like oxygen
. . .
Time is no healer
If you're not there
Lonely fever
Sad words in the air
Some things are better left unsaid
I'm gonna spend my days in bed
I'll walk the streets at night
To be hidden by the city lights
City lights
Love is like oxygen
. . .
Love is like oxygen