您要查找的是不是：
- effective diameter of thread 螺纹中径
- The effective diameter of the motor pulley is obtained by subtracting 5 mm from the outer diameter. 马达皮带轮的有效直径为外径减5mm的数值。
- The ratio of the focal length of a lens or lens system to the effective diameter of its aperture. F值物镜或物镜系统的焦距与入射光孔直径之比
- Based on the principle of plane winding, the calculation methods of the effective diameter of the turntable and the effective length of the link rod were determined. 根据球形压力容器平面缠绕原理确定了轮盘有效直径和连杆有效长度的计算方法；
- Based on the OTF, relations between the effective diameter of three operture system and pupil parameters including the diameter of sub-apertures and spacing parameter are analyzed. 以光学传递函数为标准，分析三孔径合成系统子孔径尺寸、相互间距与等效系统孔径尺寸之间的关系。
- How many spools of thread did you use? 你用了几轴线?
- The diameter of the tree-trunk is about 2 meters. 这树干的直径大约是2米。
- A loose end, fringe, or tuft of thread. 碎屑松散的线的末端、毛边或一束线
- minor diameter of thread diameter 螺纹内径
- Please give me a piece of thread. 请给我一段线。
- effective diameter of soil particle 土粒有效直径
- I bought three spools of thread at the store. 我在这个店里买了三轴线。
- Measure the diameter of this circle. 量一下这圆的直径。
- effective diameter of picture area 有效画面直径
- We must gauge the diameter of wire first. 我们必须先测量电线的直径。
- A fabric made of different kinds of thread or yarn. 混纺织物由不同种类的线或纱制成的织物
- effective diameter of picture area diameter 有效画面直径
- I need one more spool of thread before finishing the embroidery. 再来一轴线我就可以完成这幅刺绣了。
- The baby raveled the reel of thread up. 婴儿将那团线弄得乱七八糟。
- The pond has a diameter of three hundred metres. 这池塘直径有三百米。
