21_a_thrust
Fuel Tanks:

%3 0021_5004 0021_0001__Fuel_2__Tanks Fuel_Tanks 0021_5004->0021_0001__Fuel_2__Tanks
arc(z_0021_5004,r_0021_0001__Fuel_r_0021_0002__Tanks,z_0021_5002).

n21_a_thrust n21_a_thrust__1_1_1_1 Fuel n21_a_thrust__1_1_2_1 Tanks n21_a_thrust__1_2_1 : n21_a_thrust__1 FRAG n21_a_thrust__1_1 NP n21_a_thrust__1->n21_a_thrust__1_1 n21_a_thrust__1_2 PUNC n21_a_thrust__1->n21_a_thrust__1_2 n21_a_thrust__1_1_1 N n21_a_thrust__1_1->n21_a_thrust__1_1_1 n21_a_thrust__1_1_2 NS n21_a_thrust__1_1->n21_a_thrust__1_1_2 n21_a_thrust__1_1_1->n21_a_thrust__1_1_1_1 n21_a_thrust__1_1_2->n21_a_thrust__1_1_2_1 n21_a_thrust__1_2->n21_a_thrust__1_2_1
( (FRAG (NP (N Fuel;{fuel})
            (NS Tanks;{tank}))
        (PUNC :))
  (ID 21_a_thrust))