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钢材美标A516 GR.60,A573 GR.70分别对应 …
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2009-2-15 · 可能是碳素结构钢,我手上有这几个牌号你参考一下 美国 ASTM 中国 GB A283grA Q195(AI1) A283grB Q215-A(A2) A283grC Q235-A(A3) 希望对你能有帮助 ...
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GettyGames, Jigsaw Puzzles (Getty Museum)
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An online game from the Getty Museum. Reassemble artworks from the Getty Museum with these fun jigsaw puzzles. ...
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