In the alternation of wetting - dry sulfate corrosion environment, the Portland cement concrete is not suitably used.
在干湿交替的硫酸盐侵蚀环境中, 不宜采用普通水泥混凝土.
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In the accelerated corrosion environment, pre - corrosion has little effect on fatigue performance of 1420 alloy.
研究了1420合金在不同腐蚀介质环境下的预腐蚀疲劳性能.
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