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Toughness distributions of different area on HAZ of grade X 80 pipeline steel have been studied.
研究了X80级管线钢焊接热影响区不同区域的韧性分布.
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Charpy toughness and local brittleness of HAZ of X 80 line pipes made in China were studied.
研究了国产X80级管线钢热影响区的冲击韧性和组织的局部脆化.
电路交换型数据业务中的局间信令系统互连???
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