1)back in circle,后内圆形2)back out circle,后外圆形3)rounded interior corner,圆形内角4)circular inner liner,圆形内衬5)back in rocker,后内内勾形6)ellipse-shaped inner support barcing structure,椭圆形内撑
英汉例句
This paper brings out three methods of calculation on circular inner liner structures.