What? According to the contract, it must be steel.
什么！根据合同规定，要有钢材制造。
Tool steel is generally purchased in the annealed condition. Sometimes it is necessary to rework a tool that has been hardened, and the tool must then be annealed. For.
退火。退火工艺的组成为把钢加热到一定温度并保持一段时间，通常再缓慢冷却。退火是为了产生均匀化从而建立起有一致的特有性质的标准均匀化组织。
Among some steel enterprises of our country, the dust removing system have been on operation for many years, there must be some problems more or less, and it affects production and environment nearby.
在国有大中型钢铁企业中，炼铁厂的除尘系统大部分都是运行了多年的系统，或多或少都存在一些问题，影响环境与生产。
However, the current world steel market and fierce competition forced the steel production must be absolutely cost-effective, otherwise it will be weeded out.
但是，目前全世界钢铁市场的激烈竞争迫使炼钢生产必须具有绝对的低成本效益，否则就会被市场无情地淘汰。
When the failure taking place, the strength of steel plates has not been fully used, it belongs to brittle failure and must be overcome with reasonably measure.
破坏发生时，钢板的受拉强度未得到充分利用，属脆性破坏，必须采取合理的锚固措施予以克服。
The result of study shows that steel slag has low activity, therefore its activity must be excited if using it to make block.
研究结果表明：钢渣的活性较低，若用其生产砌块，必须对其活性进行激发。
Therefore, if their fireproofing coating designed according to steel members, it must be a waste of resources.
如按钢构件进行防火保护，则会造成资源浪费。
Therefore, if their fireproofing coating designed according to steel members, it must be a waste of resources.
如按钢构件进行防火保护，则会造成资源浪费。
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