spiral servo track writing 螺旋伺服刻写
Our current CDs and DVDs store data along a narrow spiral track in a thin layer of polycarbonate plastic.
我们现在的CD和DVD沿着一个狭窄的螺旋轨道把数据储存在一个微笑的塑料里。
Track their movements are running into a round, curved, spiral and so on, moves the process of sound connected, at one go, leading, long body, tail echoed each other to form a vivid dragons posture.
其动作的运行轨迹大都成圆形、弧形、螺旋形等，动作过程稳健，环环相扣，一气呵成，龙头、龙身、龙尾相互呼应，形成活灵活现的龙姿。
Movable arm scraper collects sludge using track of log spiral, so it has characteristics of good continuity and high efficiency of sludge collection.
可动臂式的刮板以对数螺旋线轨迹集泥，连续性好、集泥效率高。
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