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The French scale measures the outer diameter of the catheter, not the size of the internal drainage channel (inner diameter). For instance, a two-way catheter of 20 Fr and a three-way catheter of 20 Fr have the same outer diameter, but the three-way catheter has an additional channel for irrigation, reducing the size of its drainage channel.
The Birmingham gauge ranges from 5/0 or 00000, the lowest gauge number corresponding to the largest size of 0.500 inches (12.7 mm), to 36, the highest gauge number corresponding to the smallest size of 0.004 inches (0.10 mm). The increments between gauge sizes are not linear and vary. [2]
Comparison of SWG (red), AWG (blue) and IEC 60228 (black) wire gauge sizes from 0.03 to 200 mm² to scale on a 1 mm grid – in the SVG file, hover over a size to highlight it. In engineering applications, it is often most convenient to describe a wire in terms of its cross-section area, rather than its diameter, because the cross section is directly proportional to its strength and weight ...
American Eskimo Dogs are small to medium dogs, and come in three size varieties: [7] Toy: 9–12 inches and 5–10 lbs / 22–30 cm and 2.27–4.5 kg; Miniature: 12–15 inches and 10–20 lbs / 30–40 cm and 4.5–9 kg; Standard: 15–20 inches and 15–40 lbs / 38–50 cm and 6.8–18 kg
In 2007, a study identified a gene that was proposed to be responsible for dog size. The study found a regulatory sequence next to the gene Insulin-like growth factor 1 (IGF1), which, together with the gene and regulatory sequence, "is a major contributor to body size in all small dogs." Two variants of this gene were found in large dogs ...
AN sizes range from -2 (dash two) to -32 in irregular steps, with each step equating to the OD (outside diameter) of the tubing in 1 ⁄ 16-inch increments. Therefore, a -8 AN size would be equal to 1 ⁄ 2-inch OD tube. However, this system does not specify the ID (inside diameter) of the tubing because the tube wall can vary in thickness.
As time passed, farmers bred the Standard Schnauzer into a smaller, more compact size for ratting by combining it, according to cynologist theorization, with one or more small breeds such as the Affenpinscher and Miniature Poodle, [5] [1] [11] [12] Miniature Pinscher, [7] [8] or Pomeranian, [13] or by chance from smallest specimens of the ...
The dog’s vigilance, size, affectionate temperament, and ease of care soon resulted in its becoming a popular choice in urban centers as well, and by the 1920s the Miniature Fox Terrier was iconic. So well known and popular was the “Little Foxie” that very little thought was given to the need to preserve its lines.