外溢流活门
votary joint
voter threshold
voting system
Volex
vp concentration
fire-sleeve
sidebars
flahing
cauton
cautin
vr simulation
apchs
servc
alternate level
alternate levels
左发动机
universal low-thrust
univariate study
unity eigenvalue
unit-vector normalization
housing recess
unitary experimental datum
unitary datum
unit width
unit volume
unit value
equest.
unit span
unit quaternion
unit process
unit of time 时间单位
unit matrix
unit mass
unit load methunit load method od
unit length
unit impulse
unit direction
unit cost
unit aircraunit area saving ft
unique solution
unique opportunity
uninstalled thrust
unimolecular decomposition-rate
est
unilateral decoupling
保留系统
sequence initialization