非破壊検査の抽出比率の問題
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タンクの直径は21メートルで、板のサイズは2×12メートルです。「T」字縫いの抜き取り率は25％、縦縫いの比率は3％、環状縫いの比率は4％です。 「T」字ステッチは何本、環状ステッチは何本取るのでしょうか？縦縫いはいくつ？
レイアウト図を作れば、できあがります
一帯板の4つのT字型溶接部から1つを取る
T縫い3つ、縦縫い2つ、環縫い9つ
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