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お尋ねしますが、ASTM B619のニッケルおよびニッケルコバルト製溶接管規格における1級と2級は、どのように区分されているのでしょうか?

2015-11-19View Original

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規格の1.3.1と1.3.2の違いについて教えていただきたいです。クラス1は「溶接されたサイズのSA」、クラス2は「溶接されて冷間加工されたSA」です。ご返答ありがとうございます

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