回声測深仪用的金属記录紙,目前主要靠国外进口,且价格昂貴,不易購买。这种記录紙使用在水深不大的河流时,往往只能用到一半,其余就沒有用了,形成很大浪費。現在介紹一种节約用紙的方法如下: 在水深25米范圍內,可在回声仪記录笔皮带右側和記录笔尖接触处的地方,即金属接触片的下半截上,貼上一层普通的胶紙或胶布,使接触片和記录笔尖隔 Echo sounder with metal recording paper, mainly by foreign imports, and expensive, not easy to buy. This kind of recording paper can only be used halfway when it is used in the river with low water depth, and the rest is useless, resulting in a great waste. Now introduce a method of saving paper as follows: in the depth of 25 meters, the echocardiography pen in the right side of the pen and recording pen touch where the place, that is, the lower half of the metal contact sheet, affixed to a layer of ordinary Tape or tape so that the contacts and stylus tip are separated