If a spanner is slightly too large, do not make a fit by using packing, such as a washer.Get the correct size of spanner, or if one is not available use an adjustable spanner.

• 如扳手稍微大些，不要垫象胶圈一类的包扎物使它合用，找一尺寸合适的扳手或用一可调节大小的扳手。