distance vector-hop(DV-Hop)
DV-Hop distance vector-hop algorithm
Hop-by-Hop Congestion Control
hop-by-hop explicit control algorithm
IPv6 hop-by-hop options header
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
fiscal system at county level and township level
four-energy-level laser (=four level laser)
high-level and low-level jet