A diameter is a straight-line segment that passes through the center of a circle or sphere and whose two end points lie on the circumference of the surface. The center is a point of symmetry within a circle or sphere, with any diameter passing through...

In more modern usage, the length of a diameter is also called the diameter. In this sense one speaks of the diameter rather than a diameter, because all diameters of a circle have the same length, this being twice the radius. For a convex shape in the...

SUMMARY Two hundred and six standard PA chest X-rays were measured. The mean diameter of the left main bronchus (LMB) was 1261.9 mm. The mean diameter of the 92 male LMB was 13.026, and for females 11.81.6 These data correspond closely to that...

Shops using CNC milling machines or machining centers to cut large-diameter holes in plates and similar workpieces often go about it in either of two ways. One approach is to mill a helical path around the circumference, in which case the falling slug...

Operators of the trans-Alaska pipeline hope a scraping device will push out a piece of metal 20 inches in diameter that's been missing in the pipeline since December.A pipeline cleaning device known as a scraper or paraffin pig broke apart inside the pipeline in December...

Operators of the trans-Alaska pipeline hope a scraping device will push out a piece of metal 20 inches in diameter that's been missing in the pipeline since December.A pipeline cleaning device known as a scraper or paraffin pig broke apart inside the pipeline in December...