凶猛
发表于 2025-3-26 22:32:22
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兵团
发表于 2025-3-27 02:41:42
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Phagocytes
发表于 2025-3-27 06:15:54
Influence of CaO Grain Refiner Addition on the Microstructure and Mechanical Properties of As-Cast M yield strength and elongation versus alloys concentrations were established. It has been found that grain refinement is not the main strengthening mechanism in both systems but the effect of grain refinement strengthening component is higher in Mg–CaO system than that in Mg–Ca system.
猛然一拉
发表于 2025-3-27 13:25:37
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刺耳的声音
发表于 2025-3-27 17:02:38
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brassy
发表于 2025-3-27 21:13:34
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图画文字
发表于 2025-3-27 23:49:31
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聋子
发表于 2025-3-28 04:40:34
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等级的上升
发表于 2025-3-28 08:46:13
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Eclampsia
发表于 2025-3-28 10:57:44
Introduction,election of transaction partners, the design of supplier contracts, and the choice of information technology solutions to support supplier search, supplier evaluation, and the settlement of a business relationship.