Hengyang City in Hunan Province concave surface of the shaft, surrounded with a ring of intermittent ridge mountain ridge, a typical situation in the basin.
衡阳市处于湖南省凹形面的轴带部分，周围环绕着断续环带属岭脊山地，构成典型的盆地形势。
2
The symmetrical barrel rollers position themselves freely on the concave outer ring raceway, which compensates for any shaft misalignment or flexing.
对称每桶辊位置上自由凹外圈滚道，使用户在任何轴偏心或展示。
3
This article has described expanding method for repairing the concave retaining ring caused by the hydraulic bulging.