在冲天炉上部烟囱顶端设安全平衡盖板，以保证生产的正常进行；
The safety of production can be assured by installation of a balance safety valve at the top of the stack over the cupola furnace.
渥太华和华盛顿必须在自由贸易流通和司法安全事务之间找到一个微妙的平衡。
Ottawa and Washington have to find a delicate balance between the free flow of commerce and legitimate security concerns.
当然，我们要认识到很重要的一点，就是必须始终在增长和安全中取得平衡。
Of course, it is important to recognize that we must always balance growth and safety.
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