青云翻译

At present, domestic and international clearance for the large negative four-point contact ball bearings, or a gap in the theoretical analysis.

At present, at home and abroad with a negative clearance of theoretical analysis of large four-point contact ball bearings or a blank.

At present, domestic and foreign large-scale four contacts the ball bearing regarding the belt negative windage the theoretical analysis is a blank.

At present, both at home and abroad with negative clearance for the large 4 point contact ball bearings of theoretical analysis and a blank.

At present, at home and abroad with a negative clearance of theoretical analysis of large four-point contact ball bearings or a blank.