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吴康寧於1950年由長江下游局臨时調在浦江码头檢修工程委員会工作,当时由他負責回声测深仪的测量長江水下地形工作,以便随时掌握碼头崩坍的情况,但是仪器上需用一种特制的記錄紙,紙上浸透一种化学藥品用來記錄回声电流的信号;从而反映出江床的深度,当时这种纸存貨不多,眼看就要用完,国內不会做,也買不到,如果因沒有纸使仪器停頓,那么在40公尺深流速很高的長江中测深,就是一件非常困难的事。当时在党及領導的支持下並由他弟弟担任試驗工作,在試制过程中虽走
Wu Kangning in 1950 by the Yangtze River downstream Bureau temporarily transferred to the Pujiang Ferry Pier repair work committee, was responsible for the echo sounder measurement of the Yangtze River underwater terrain in order to keep abreast of the wharf collapsed, but the instrument required Using a special recording paper, the paper was impregnated with a chemical used to record the signal of the echo current; thus reflecting the depth of the riverbed, when the paper stock was small, Can not buy it. If there is no paper to stop the instrument, it is very difficult to measure the depth of the Yangtze River at a velocity of 40 meters. At that time, with the support of the party and the leadership and his brother as a pilot, although the trial process