fuel level control switch
AFR fuel storage (away-from-reactor fuel storage)
array of fuel rods in the fuel assembly
coupling mechanism between upper level and low level jet
fiscal system at county level and township level
interaction between upper level and lower level
municipal level and county level
identical unit or proportional unit of the body
time-rock unit =time-stratigraphic unit
150MPa fuel injection system
acceleration fuel system
acceptable viscosity of fuel