改进型椭圆轴承
modified elliptical bearing
椭圆轴承功耗
power consumption of elliptical bearing
曲轴轴承轴颈配合面
crankshaft bearing journal surface
半椭圆形弹簧
semi elliptic spring
half elliptic spring
semi-elliptical spring
half-elliptic spring
half-elliptic spring(semi-elliptic spring
半椭圆形垄
ridge of half ellipse shape
变形椭圆齿轮
Deformable elliptic gears transmission
变形椭圆模板
deformable ellipse template
波浪形椭圆焊管
Corrugated oval welded pipe