auger sinker bar guides 冲击钻杆导向器
Guided by precision machine latch bar guides.
由精密滑轨准确引导引导的门闩。
The periodic bar and beam structures are modeled as one-dimensional periodic wave-guides and the expression of transfer matrix of elastic waves is derived.
将周期杆梁结构看成一维周期波导，推导了结构中弹性波传递矩阵的表达式。
The guidance roller supports the dummy bar when the casting process is just started. It also supports the soild state billet with liquid core and guides the billet direction in the casting process.
导向辊 的作用是对带液心的铸坯起支撑作用和导向作用，同时也是在开浇时对引锭杆进行支撑和导向。
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