Monday, May 31, 2010

'15/4/10'

Today i have learn about the screw test. I use the electric screw driver with torque. I need to calibrated first that torque depend on screw size. For the metal screw, the screw are loosen and tighten for 5 times each. For the plastic screw, the screw are loosen and tighten 10 times each.

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