8.15 – One question per day: win wealth and gain knowledge (Pharmaceutical Engineering Technology version)
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Those who answer correctly receive 10 wealth points, while those who answer incorrectly receive 3 wealth points (rewards are available for answers given within 24 hours). Fill-in-the-blank question: For a pipe with a diameter of φ57×3.5, the “57” represents the ( ) of the pipe, and “3.5” represents the ( ) of the pipe.
The answer is upstairs. Outer diameter, wall thickness~
57 is the outer diameter, 3.5 is the wall thickness
57 is the outer diameter of the tube, and 3.5 is the wall thickness of the tube.
57 is the outer diameter of the tube, and 3.5 is the wall thickness of the tube.