"KDS12L"--Spine.

Tools & materials -- Twin-engine aircraft -- Single-engine aircraft -- Tandem-rotor helicopter -- Cargo ship -- Twin-propeller airliner -- Three-engine wide-body aircraft -- Search and rescue (SAR) helicopter -- Tugboat -- Supersonic airliner -- Riverboat -- Light aerobatic biplane -- Hovercraft -- Jumbo jet -- All-metal twin-engine aircraft -- Polar research vessel -- Wright Flyer -- Ocean steamer -- Medium-lift transport helicopter -- Short take-off and landing aircraft -- Lightweight twin-engine multipurpose helicopter -- Light utility helicopter -- Single-engine light aircraft.