两个极点的指尖，固定在一个正立着的大圆环上，大圆环嵌人水平大圈内，下面四根雕有龙头的立柱支撑着水平大圈，托着整个天体仪。
The globe is placed in a standing hoop, which is beset into a horizontally placed hoop, suppor-ted by four pillars decorated with dragonhead patterns.
转子上装有宽极弧圆环结构的永磁体，永磁体用非磁性的薄壁外圈固定。
A permanent magnet with a wide pole arc circular ring structure is arranged on the rotor and fixed with a non-magnetic thin-wall outer ring.
对焦锁定系统已经从点固定改变为面固定，其原理是利用一个圆环及内部为高抗震性而设计的机械结构来实现的。
Focus locking system has been changed from point fixing to surface fixing utilizing a ring and internal mechanical structure designed for high vibration resistance.
对焦锁定系统已经从点固定改变为面固定，其原理是利用一个圆环及内部为高抗震性而设计的机械结构来实现的。
Focus locking system has been changed from point fixing to surface fixing utilizing a ring and internal mechanical structure designed for high vibration resistance.
应用推荐