21. In a common variation a pair of rods was used, with one on its upstroke as the other descended. 22. In general, the garaldes have finer proportions than the humanists, and a stronger contrast between downstroke and upstroke . 23. So both the upstroke and downstroke create lift . talk ) 14 : 06, 15 September 2008 ( UTC) 24. The computer traces the handwritten street name, keeping track of how many times upstrokes become downstrokes; downstrokes become upstrokes. 25. The computer traces the handwritten street name, keeping track of how many times upstrokes become downstrokes; downstrokes become upstrokes . 26. The wings rotate limitedly on axles near their front edges, and thus on upstroke and downstroke they propel water backwards. 27. On the first upstroke of the engine there would be no fuel inducted into the cylinder as the crankcase was empty. 28. By folding the wings inwards towards their body on the upstroke , they use 35 % less energy during flight than birds. 29. In Senter's of the position of the shoulder joint, a normal upstroke would be impossible precluding flapping flight entirely. 30. To make an upper case " B " or any other letter, make a small upstroke before writing the letter.
