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1?Rack and pinion design, stable functioning;

2?Double cylinder structure, double output could be achieved;

3?The manufacturing precision of working platform is high, and is easy for installation , and is of precise orientation;

4?The center of working platform has a through hole, and pipe can belocated and passed through this hole;

5?Two sides of cylinder have orientation holes, to facilitate installation;

6?Two modes of buffer could be chosen, adjustment bolt buffer and internal shock absorber, the maximum buffer energy of internal shock absorber is 3-5 times that of adjustment bolt buffer.

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