The water was reacting with the ferrous iron in the tank.

水与水箱中的质产生化学反应。

Add Ferroin indicator and titrate with 0.025 N ferrous ammonium sulphate solution.

加入菲绕啉离子，用滴定法测量硫酸溶液。

Metal complexants such as ferrous complexant and cobaltic complexant are common used in this process.

液相络合法常用的金属络合剂有络合剂和钴络合剂等。

VTT also laccases intercomparsion reaction catalyzed by enzymes, non-ferrous products of indicator for leakage.

VTT也利用酶催化促酶反应形成有色产物，研究渗漏指示剂的构成。

For the trading business, the company focuses on non-ferrous metals such as copper, aluminum, lead, zinc, kirksite,Zinc Concentrate,etc.

公司的贸易主要铜、铝﹑铅﹑锌﹑锌合金和锌精矿等有色金属产品。

Among other reagents used have been ??and titanous ion; a mixture of ferrous ion, oxygen, ascorbic acid , and ethylenetetraaminetetraacetic acid.

使用过的其它试剂有?Ш脱穷牙胱印⒀翘?离子氧，抗坏血酸和乙四胺四乙酸混合物。

CONCLUSION Ferrous Lactate tablet is a highly effective drug as Ferrous succinate tablets and with endurably mild side effects to patients with IDA.

结论乳酸片治疗IDA疗效好，胃肠不良反应轻，患者耐受性好，治疗IDA安全、有效的口服剂。

Compund polymer with alumium polychloride and ferrous polysulfate as its main ingredients was used as water scavenging agent in the treatment of dye-house waste water.

用以聚合氯化铝、聚合硫酸为主的复合聚合物作净水剂,处理印染废水。