With OOP technique, CTDIB, a class applied to textile image process has been constructed. The example of wool diameter testing explains how to use this class.

利用面向对象程序设计（OOP）技术构建了纺织图象处理专用类CTDIB，并且以图象法羊毛直径测试为例介绍其使用方法。

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Tree density in the forest decreased with the increases of height class and diameter class, whereas species abundance did not increase.

栎类次生林乔木的密度随高度级、径级的增加而递减，但树种丰富度却不随树木的密度增加而增加。

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The value of tightening torque is relative not only to the nominal diameter and quality class of the bolt, but also to the security of the threaded fastener.

指出螺栓联接的扭紧力矩值不仅与螺栓的公称直径及性能等级有关，还与能否保证联接可靠工作有关。

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