In lockpicking a cylinder lock, the shear line is where the inner cylinder ends and the outer cylinder begins. This break in the lock mechanism is a vital part of the lockpicking process, as it allows a picked pin to "hang" while the others are being picked.
Example Usage of Shear
yssyatis: WIND Shear WARNING, B737 REPORTED MODERATE OVERSHOOT WIND Shear AT 300 FT ON FINAL RWY 34L AT 0945. WX: CAVOK. TMP: 25. QNH: 1013.
tweetalot: Oscillating Shear valve for mud pulse telemetry
[7280432] http://bit.ly/6IpTfc
Sciencia: The three-dimensionality of obstructed Shear flows http://kele.es/qc1