内窥镜能够有效的提高工作人员检查设备问题效率，可以检查部件内部的腐蚀、锈斑、铁屑异物、对接焊缝等质量缺陷等。那么它是怎样确定设备存在的问题呢？从下述几个方面可知设备出现了问题。
The endoscope can effectively improve the efficiency of staff to check equipment problems, and can check the quality defects such as corrosion, rust spots, iron filings and foreign matters, butt welds and so on. So how does it determine the problems of the equipment? It can be seen from the following aspects that there is a problem with the equipment.
1、裂纹
1. Crack
光束照射到被检测物体表面时，观察到黑色或者亮色线条，而且放大一定倍数，发现线条周围有不规则边缘时，可判定为裂纹。
When the light beam irradiates the surface of the detected object, black or bright lines are observed and magnified by a certain number of times. When irregular edges are found around the lines, it can be determined as cracks.
2、腐蚀
2. Corrode
光束照射下，观察有块状、点状不光滑表面，在一定放大倍数下轻微凹凸不平为腐蚀。
Under the irradiation of the light beam, it is observed that there are massive and point shaped unsmooth surfaces, and slight unevenness under a certain magnification is corrosion.
3、焊漏
3. Welding leakage
光束以合适角度照射时，观察到与熔化金属相连，无分界线的凸起时则为焊漏。
When the beam is irradiated at an appropriate angle, it is observed that it is connected with the molten metal, and the bulge without boundary is welding leakage.
4、起皮
4. Peeling
当光束平行照射时，发现在凸起部分背后有阴影；改变光束照射角度，则发现表面凸起部分与周围被检测物有明显分界线，则可判定为起皮。
When the beam is irradiated in parallel, it is found that there is a shadow behind the convex part; When the beam irradiation angle is changed, it is found that there is an obvious boundary between the convex part of the surface and the surrounding tested object, it can be determined as peeling.
5、拉线和划痕
5. Cables and scratches
在光束照射下，如发现被测物表面存在较规则的连续性长线，判定为拉线。
Under the irradiation of light beam, if there is a regular continuous long line on the surface of the measured object, it is determined as a stay wire.
6、斑点
6. Speckles
在光束照射时，观察到与周围被检物色泽不同的光滑无凹凸表面可判定为斑点。
When the light beam is irradiated, the smooth non concave convex surface with different color from the surrounding tested object can be determined as spots.
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