... adjusted; hydraulic system and lubrication system control respectively,broaching U, V-notched two patterns. It is an alternative to the replacement ... any two. Simple operation, the processing of V-and U-shaped notch, completely meet GB/T229-1994 "metal Charpy notch test method ... parameters1, the processing of the sample gap: V meets GB/T229-1994U-2mm meets GB/T229-1994U-3mm meets ISO148, ASTMU-5mm meets ...