In this paper, discussed the vibration of circular parts machining, proposed out the best trace of CNC powerful turning and the method of limited depth.
阐述了环形件数控强力车削加工中的颤振问题，提出了数控强力车削环形件避免发生颤振的最佳工艺路线和极限切深。
The depth of information produced from a diagnostic trace is specifiable.
诊断跟踪产生的信息深度是可指定的。
The hardness and depth of chill layer on the roller outer surface can be raised with adding trace Bi into liquid Fe in centrifugal casting.
离心铸造时在铁水中加入微量的铋，可以提高滚筒外壳冷硬层的硬度和深度。
Trace elements as Mn, Cr, Ni and V trend towards increases from shallow to deep water sedimentary settings, thus could be used to indicate relatively changes of paleo-water depth.
等元素的含量从浅水到深水总体呈增加之势，因此可以指示古水深的变化。
Trace elements as Mn, Cr, Ni and V trend towards increases from shallow to deep water sedimentary settings, thus could be used to indicate relatively changes of paleo-water depth.
等元素的含量从浅水到深水总体呈增加之势，因此可以指示古水深的变化。
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