True Dual Two-Stage Gas Infra-Red Tube Heaters provide precise air to gas ratios at both the high- and low-heat stages for optimum efficiency.
该管式红外线加热器提供低热量的最佳效率高精度空气对气体比。
There is great energy-saving potential in the oil refineries of the P. R. China because of the shortcomings such as high temperatures of discharging gas and low heat efficiency in the heaters.
我国炼油厂加热炉普遍存在排烟温度高和热效率低的缺点，具有较大的节能改造潜力。
There is great energy-saving potential in the oil refineries of the P. R. China because of the shortcomings such as high temperatures of discharging gas and low heat efficiency in the heaters.
我国炼油厂加热炉普遍存在排烟温度高和热效率低的缺点，具有较大的节能改造潜力。
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