Definitions containing the term double back

What does double back mean?

DHLD	Double-Heterojunction Laser Diode Academic & Science » Electronics
BHRE	Back Hand Reactive Exertion Medical » Physiology
BFPB	Business in the Front, Party in the Back Miscellaneous » Funnies
4WG	4-pass Wet-back fire tube Boiler with Gun Burner Business » Products
BRDD	Double Dolphin bangle BRacelet Business » Products
RABS	Rotation Around the Back Side Medical » Physiology
42N	Double JJ Resort Ranch Airport, Rothbury, Michigan USA Regional » Airport Codes
DCOF-SM	Double Clad Optical Fiber - Single Mode Academic & Science » Electronics
DBCS	Double Byte Character Set Computing » Assembly
BUICS	Back- Up Interceptor Control System Governmental » Military
WWLB	When We Look Back Community » Religion
DSTN	Double-layer Super-Twisted Nematic Academic & Science » Electronics
DDR RAM	Double Data Rate Random Access Memory Computing » Hardware
NIMBY	Not In My Back Yard Community » Housing
BK	Back Community » Housing
dbl	Double Community » Housing
DBL	DouBLe Governmental » NASA
BK	Back Governmental » NASA
BUDR	Back-Up and Disaster Recovery Computing » Security
DS	Double Stranded Medical » Human Genome
CB	Call Back Computing » Telecom
DSB	Double Sideband Governmental » Transportation
RBT	Ring Back Tone Computing » Telecom
DHBT	Double Heterostructure Bipolar Transistor Academic & Science » Electronics
TORB	Telephone Order Read Back Medical » Hospitals