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The machinist used a button punch to crimp the two layers of sheet metal together, preventing any slippage under load.
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The machinist used a button punch to crimp the two layers of sheet metal together, preventing any slippage under load.
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Related words
button punch
Noun
Japanese Meaning
ボタンパンチ：複数の厚さの金属板を互いに押し付け、滑り止め効果を得るために、金属に小さなくぼみ（ボタン状の凹み）を形成する加工法
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