aircraft power class

Deductions

• aircraft power class is for example airplane ⇐ (airplane is a aircraft power class), (is a is inverse of is for example)
• second-order class is for example aircraft power class ⇐ (aircraft power class is a second-order class), (is a is inverse of is for example)
• airplane is a aircraft power class ⇐ (aircraft lift-power class is subclass of aircraft power class), (airplane is a aircraft lift-power class)