若采用螺旋焊管周长自动控制系统可以实现自动化控制螺旋焊管的直径。
If it used this circumference automatic control system, the spiral welded pipe diameter could be controlled automatically.
我们指出周长方向的波函数干涉是影响碳纳米管电导的重要因素。
The circumferential interference is found to be an essential mechanism in determining the transport properties of the carbon nanotubes.
螺旋管的周长、直径等参数对于螺旋管的质量非常重要。
Some parameters, such as perimeter, diameter, is very important to quality of spiral welded pipe.
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