In this system, the dual non diffracting beams are used as incident beams. The system structure is simple and flexible.
系统以双无衍射光束作为测量光束，结构简单灵活。
The valve is welded in fine steel, having the features of peculiar structure, non-obstruction, reliable and flexible operation.
鄂式闸门采用优质碳钢焊接成形，结构独特，运行灵活可靠，无卡阻现象。
The valve is welded in fine steel, having the features of peculiar structure, non-obstruction, reliable and flexible operation.
鄂式闸门采用优质碳钢焊接成形，结构独特，运行灵活可靠，无卡阻现象。
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