上、下转盘连接螺栓为9.8级高强度螺栓，使用淬火平垫，180°对称紧固

The upper and lower turntable connecting bolts are 9.8 grade high-strength bolts, using quenched flat washers, symmetrically tightened at 180°, and the torque is 280N·m. Under normal conditions, the pre-tightening force should be checked once after 100 hours of installation and operation, and once every 500 hours of operation thereafter; it should be replaced after 14000 hours of operation or 7 years after purchase.

The upper and lower turntable connection bolts are 9.8 high-strength bolts, using quenched flat pads, 180 degrees symmetrical fastening, and 280N.m. Under general conditions, after the installation and operation of 100h should be checked once the pretension force, after each 500h operation check once;

The connecting bolts of upper and lower turntables are grade 9.8 high strength bolts, which are fixed symmetrically at 180 ° with a torque of 280n · M. Under normal conditions, the preload should be checked once after 100h of installation and operation, and then every 500h of operation; after 14000h of operation or 7 years of purchase, replacement should be carried out.