| http://www.w3.org/ns/prov#value | - A practical range was set using 1000 g/25 mm as a criterion, though it depends on uses. [0164] (2) Measurement of Tack [0165] Using a test piece with a width of 25 mm, tack was measured by a ball tack test and is expressed by the number of the largest possible steel ball that could be stuck at an inclination angle of 30 degrees.
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