As an increasing need for protecting the environment, a new type of the heat pump water heater with the natural refrigerant CO_2 will appear in water heater market.
随着人们环保意识的增强，以天然制冷剂CO_2为工质的热泵热水器将作为一种新型产品进入热水器市场。
With the constant increasing of demand of environment protecting, the elec-bag precipitator can be an good choice instead of an electrostatic precipitator or bag-type dust collecting.
随着我国对环保要求的不断提高，电袋复合除尘系统成为替代传统低效率除尘设备的方案之一。
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