regular split-level structure
split-level car park building
split-split plot design
Zeeman energy level split
split chase mo(u)ld split(ting) chase mo(u)ld
4-level frequency modulation (4-level FM)
bi-level programming model with two lower level models
coupling mechanism between upper level and low level jet
coupling of high level jet and Low level jet
Digital Signal Level 0- Digital Signal Level 3 DS0-DS3