等高线、高程点赋值
assignment for elevation point and contours
不对称四轮放线滑车
asymmetrical 4-wheel stringing pulley
组合式放线滑车
combinated stringing tackle
滑车滑液鞘
Vagina synovialis trochleæ
HlZ电子等高线
HIZ electronic contourliner
X射线高压发生器
X-ray high voltage generator