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9.2 Tilting Device
9.2.1 The base shall be installed according to the following requirements:
1 The longitudinal and horizontal center lines shall be adjusted，and the measurement by plumb wire should be carried out，with the allowable deviation of 2.0mm.
2 The elevation shall be adjusted，and the measurement by optical instrument should be carried out，with the allowable deviation of±2.0mm.
3 The levelness shall be adjusted，and the measurement by leveler should be carried out，with the allowable deviation of 0.20/1000.
9.2.2 The tilting hydraulic cylinder shall be connected with the base and the cardinal axis of cradle in accordance with the requirement of the design technical document.