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一九五四年原上游工程局所用NK_3型迥声测深仪因缺少记录纸(乾纸),使工作无法继续进行。当时我会提出了使记录纸能够多用几次的办法,经试验和实际运用证明有效。现在把它介绍出来,供使用干记录纸的回声仪运用与节约用纸的参考。 NK_3型回声测深仪所用朝记录纸的制造和能够显示测深记号的道理是:在石墨导电纸的表面涂上一层很薄的绝缘涂料,当记录针尖通过高压电流时就把这层绝缘涂料打穿,石墨纸的本来颜色显露出来,留上了记号。这种记号就是我们所需要的发
In 1954, the NK_3 type sounder used by the original upstream engineering bureau was unable to continue its work due to the lack of recording paper (dry paper). At that time, I would like to propose how to use the recording paper several times. It is proved effective through experiments and practical application. Now introduce it for the use of dry-record paper echo and save paper reference. NK_3 type echo sounder used toward the record paper manufacturing and can display the sounding token reason is: graphite conductive paper coated with a thin layer of insulating coating, when the recording needle through the high-voltage current when this layer of insulation Paint to wear through, the original color of graphite paper revealed, leaving a mark. This sign is what we need hair