translate English to French: Various types of mechanical grading systems are available to evaluate stiffness (e.g., Metrigard E computer, MSR machines); they are reliable, but they have limitations as to the lengths of lumber they can handle.
Il existe divers types de machines et d’appareils permettant d’évaluer la rigidité du bois (Metrigard, E-computer, etc.). Ces machines donnent des résultats fiables mais elles ne peuvent traiter toutes les longueurs de bois.