What is the function of the telescopic cylinder in the hydraulic press?

The telescopic cylinder in the hydraulic machine is composed of two or more piston cylinders. The inner hole of the piston rod of the previous piston cylinder is the cylinder barrel of the latter piston cylinder. When it is extended, it can achieve a very long working stroke. When retracted, it maintains a small structural size. The external audit action of the telescopic cylinder is carried out step by step. When the end of the stroke is reached, the cylinder with a slightly smaller diameter begins to protrude, and the final stage with the smallest diameter protrudes last. The diameter of the overhanging cylinder is getting smaller and smaller, and the working speed is faster.