mounting bolt pattern 安装螺栓模式 ; 安装孔
pattern bolt 定型锚杆
four-bolt hole pattern 四螺栓孔结构
bolt hole pattern 螺栓孔式样
Then damage identification of severity of bolt looseness was studied by utilizing the pattern classification function of the BP neural network.
然后利用BP神经网络的模式分类功能，进行了螺栓松动程度的损伤识别研究。
By theoretical analysis and lab test, put forward a kind of new type bolts which may prevent bolt tails from being broken, bolt construction structure's pattern, and bolt made technology.
通过理论分析和实验，提出了一种防止锚尾破断的新型锚杆，以及锚杆结构形式和加工制造工艺。
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