The stability factors W of a self-synchronous vibrating machine, in space motion, are given by formula(21)and (54) as working with single mass and dual mass respectively.
自同步振动机的稳定性指数W，当振动机为空间单质体和空间双质体时其表达式分别为式（21）及式（54）。
Wei W. -b., Chen Z. -b 2008. Wrist arthrodeses with wrist fusion plate in 21 cases: Biocompatibility and function evaluation.
魏文兵，陈振兵。腕关节融合钢板内固定21例：生物相容性及功能评估。
Teng J W. Dynamic process of substance and energy exchanges in depths of the earth and formation of mineral resources [J]. Geotectonica et Metallogenia, 2003, 27 (1) : 3 ~ 21.
[8]滕吉文。地球深部物质和能量交换的动力过程与矿产资源的形成[J]。大地构造与成矿学，2003,27 (1)：3 ~21。
(ZHANG D W, YANG H. Large integral bulkhead of titanium alloy forgings: isothermal local loading forming technology [J]. Forging & Pressing, 2012(21):32-38.
[18] 张大伟，杨合。大型钛合金整体隔框锻件：局部加载等温成型技术[J]。锻造与冲压，2012（21）：32-38。
(ZHANG D W, YANG H. Large integral bulkhead of titanium alloy forgings: isothermal local loading forming technology [J]. Forging & Pressing, 2012(21):32-38.
[18] 张大伟，杨合。大型钛合金整体隔框锻件：局部加载等温成型技术[J]。锻造与冲压，2012（21）：32-38。
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