... 又叫R参考平面，这个平面是刀具下刀时自快进转为工进的高度平面。距工件表面的距离主要考虑工件表面尺寸的变化来确定，一般可取2-5mm。 孔底平面 (Flat Bottom Hole) 子程序 (Subdlrogram) ...
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Validity and feasibility of the finite difference time domain method is demonstrated by the echo-wave signal of a flat bottom hole block.
通过与平底孔试块实际缺陷回波信号的对比，验证了脉冲超声波有限差分法模拟计算的有效性和正确性。
A circular hole equals to the cylinder of the jointing component and gaps through which the nylon can fall down are reserved in the vicinity of the opposite Angle at the bottom of the flat triangle.
在平面三角底边对角的近处，预留下与连体构件的圆柱体相当的圆洞和尼龙丝可以落下的缝隙。
Equivalent calibrations of short horizontal hole artificially defects and big flat-bottomed hole artificially defects or calculation equivalent of big flat-bottom are adopted.
采用短横孔人工缺陷和平底孔人工缺陷的当量标定或用大平底当量计算法。
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