On Tuesday, helicopters arrived with food and other supplies in one of the hardest hit towns, Constitucion, which was swamped with waves after the quake.

Therefore, it is an effectivemethod to improve corrosion fatigue property to use the hole cold-expansion technique in the aircraft and other structures.

Pressure and velocity fields of spatial cross section on an aircraft model with strake wing and double vertical tails were measured using a seven hole probe.