Why are there black diamonds and red numbers on a tape measure?
What are the red numbers and black diamonds for on a tape measure?
Tape Measure Black Diamond
Diamonds On A Tape Measure Used For measuring roof rafters and floor joists
What are the black diamonds and red numbers on my measuring tape for?
Measuring between inches to an accuracy of 1/16"
この巻尺機能を知っている人はほとんどいません! 巻尺の隠された機能
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