The annular magnet is embedded into an inner cavity of the rubber ring, the plastic cover disk is covered at the back face of the rubber ring.
将环形磁铁嵌入橡胶圈的内腔中，再将塑料罩盘盖在橡胶圈的背面。
To design the mechanical and auto-control system, the worm wheel is used to drive the outer annular magnet.
在机械及控制系统设计中，由于磁体需套装在单晶炉上，因此采用了蜗轮蜗杆机械驱动外磁环转动的机械结构。
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