In particular, the claims made for the transport of inhibitors through hardened concrete need to be assessed.
特别是阻锈剂通过硬混凝土的渗透，是需要评估的。
Some believe that the hardened gray iron used to make the components simply "fatigues" with age-as metal parts that go through millions of stress reversals eventually do.
有些人认为硬化的灰铸铁过去曾使零件很容易腐朽老化(因为经过数百万次的应力反向处理后的金属零件最后都会这样)。
For ammunition to break through, artillery shells need to be hardened by adding certain minerals to the steel.
为了让炮弹能够打穿，弹壳的钢里需要加入一定的矿物质来增加硬度。
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