导入管 meaning in English

ingress pipe

As a result , the temperature of the durene solution and the feed rate of air had a greater influence on the vapor phase concentration of durene , whilethe influence of the height from airway nozzle to liquid level and the feed air temperature on the vapor phase concentration was small
实验结果表明：均四甲苯溶液的温度、空气进料量对均四甲苯气相浓度影响较大，而导入管距离液面的高度和空气温度影响较小。