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着重论述了旋切定心与上木技术发展的几个阶段，详细介绍了每个阶段的定心与上木技术，阐述了旋切定心与上木技术的发展趋势。“,”Expounded emphatically development stages of peeling centering and grasping wood technique, introduced detailed peeling centering and grasping wood technique for each stage, expounded development trend of peeling centering and grasping wood technique.