通过所建理论模型及铣削试验讨论了铣削过程中强迫振动、颤振的产生条件及特点。

Through the theoretical model and milling experiment they discuss the condition of producing forced vibration and chatter in milling process and the chatter characteristics.

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小湾水电工程所处的自然环境、地质条件及工程规模等特点给工程建设带来了许多不确定性。

The Xiaowan Hydropower project will have lots of some uncertainties in its construction due to its natural environment, geological conditions, as well as project scale etc.

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施工中针对网壳结构特点及现场施工条件，采用低空外扩拼装、拔杆群接力提升的方法完成了安装。

Based on the structural characteristics and site conditions, low level spread assembly and pulling bar group relay lifting method is adopted to install the shell.

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