In accordance with ferrous ammonium sulfate in water samples to calculate the amount of material to restore the volume of oxygen consumption, which was potassium dichromate titration reflux.
根据硫酸亚铁铵的用量算出水样还原性物质消耗氧的量，这就是重铬酸钾回流滴定法。
However the COP of conventional ammonia-water absorption refrigeration system is relatively smaller because of its more equipments, large volume and more steel consumption.
传统的氨水吸收式制冷机，存在着系统中设备多，体积大，钢材消耗量大，制冷循环COP值较低等缺点。
Article 2 water saving shall follow the principle of unified planning, total volume control, planned water consumption, comprehensive utilization, and emphasis on benefits.
第二条节约用水遵循统一规划、总量控制、计划用水、综合利用、讲究效益的原则。
Article 2 water saving shall follow the principle of unified planning, total volume control, planned water consumption, comprehensive utilization, and emphasis on benefits.
第二条节约用水遵循统一规划、总量控制、计划用水、综合利用、讲究效益的原则。
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