thin-door is part of:
   100%  car-door
    80%  door
    50%  car  (indirectly)

thin-door contains:

Full expansion for thin-door:
   100%  1x3x1 Thin-Door (0 Pair)
   100%  1x3x2 Thin-Door (0 Pair)
   100%  1x3x3 Right-Opening Thin-Door