酸液浓度和总铁含量应该在操作中每小时检查一次。
Acid strength and total iron shall be determined every hour during operation from outlets.
总不要信赖你的仇敌，因为他的恶毒有如生锈的铜铁。
Never trust your enemy, for his wickedness is like corrosion in bronze.
总不要信赖你的仇敌，因为他的恶毒有如生锈的铜铁。
Never trust your enemy, for his wickedness is like corrosion in bronze.
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