电站锅炉汽包的下降管接口处经常发现有裂纹产生,迫使停机检修,造成很大经济损失。为知道产生裂纹处的工作应力,需要适用于特种环境下的应变计。目前只有个别国家能生产该种应变计,但价钱昂贵,每片约1000美元,为此,课题组研制了适用于高温、高压、水下 Downfall pipe joints of power station drums are often found cracks, forcing downtime maintenance, resulting in great economic losses. In order to know the work stress where the crack is generated, a strain gauge suitable for a special environment needs to be used. At present, only a few countries can produce the kind of strain gauge, but the price is expensive, about 1000 US dollars per piece. Therefore, the research group has developed a high temperature, high pressure, underwater