Значения для термина "sustaining surface" отсутствуют.
1 This would give two planes with a sustaining surface of 360 square feet.
2 But the sustaining surface is only four times as great.
3 The smaller the sustaining surface , the higher the speed.
4 One square foot of sustaining surface for every pound of the total weight will be sufficient for security.
5 But this time he quickly shook out a portion of his reefed sustaining surface and slowed down in time.
6 The weight, compared with sustaining surface , if expressed in understandable terms, would be equal to sixty pounds for every square foot of surface.
7 We have an aeroplane with a sustaining surface of 300 square feet which weighs 900 pounds, or 30 pounds per square foot of surface.
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