Terms for subject Navigation containing 回声"

Chinese	English
反向倒置式回声测深仪	inverted echo sounders
带压力计的反向回声测深仪	inverted echo sounders with pressure gauges
水下爆炸回声测距	submarine explosive echo ranging
水道测量精密扫描回声测深仪	hydrographic precision scanning echo sounder
联合回声测距和测深	combined echo ranging-echo sounding