在第三章中主要研究了扁锥面网壳的非线性动力稳定性问题。
In chapter three, the problem of the nonlinear dynamical stability of the shallow reticulated conical shell is analyzed.
在单齿圈破岩试验中，理想的岩样是与牙齿齿顶线相贴合的锥面岩样。
The ideal rock sample is the conical surface rock sample that can joint crest of teeth in single row drilling experiment.
阐述了麻花钻内锥面刃磨法的原理及参数的确定方法，揭示了内锥面刃磨中存在“翘尾”现象的原因并提出了相应的解决措施。
The inner cone grinding method of twist drills is discussed. The phenomenon of up tail in the grinding method is exposed and the solving idea is given.
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