... , high intensity, good stability, conducive to improving the core harvest rates, to extend the service life of diamond ... operator can be chosen at random to form the core tube of different lengths. Within the outer cylinder ... good wear resistance, less torque. 5, when the core barrel was stuck in the underground, it is easy ... -1/2"∼9-5/8"12-1/4"Core diameter(mm)45667089101105133 Conventional coring tool