SIMULATION AND EXPERIMENTS ON SELECTING THE ECHO FREQUENCY IN DETECTING THE HEAT EXCHANGE TUBE FOULING
SUN LingFang, WANG TongTong, LI Xia, PIAO Heng
Journal of Mechanical Strength . 2019, (1): 72 -79 .  DOI: 10.16579/j.issn.1001.9669.2019.01.013