He spoke as if he had encountered in the installation of continuous settlement belt for a long time, it is not possible that the cause of the damage is from the belt installation.
He spoke as if He has experience in the installation of the belt very long cuttings. It is possible that the cause of the damage will come from the installation of the belt.
He spoke as if He has experience in the installation belt as preserved for a long time. It is impossible that the cause of damage from the installation belt.