Ntupu akwa akwa na-abụghị akwa maka mkpuchi ihu na-eche ihu ike
N'ihi ịdị arọ, ike dị elu, obere shrinkage / elongation, mgbochi corrosion, nke etinyere scrims na-enye uru dị egwu ma e jiri ya tụnyere echiche ihe eji eme ihe. Ma ọ dị mfe iji ọtụtụ ụdị ihe laminate, nke a na-eme ka ọ nwee ọtụtụ ngwa ngwa.