... 方位角摆动范围 spread of bearings 线圈节距 spread of coil 放射性物料扩散(散布) spread of radioactive material(s) ...
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Coil binding is one of common half man-made binding methods and its products are completely spread out and placed.
螺旋装订是一种常见的半手工装订方式，其产品可完全摊开平放。
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