gluewater

It should be townee's masterpiece,and the mark of gluewater is also obvious.

应该是老作，胶水痕迹也明显哪。

Then, we found that gas tightness had some problem, because gluewater of the heat copper of engine didn't pledge gas-tightness.

我们分析其原因，发现气密性并不好，加热处胶水并不能保证密封性。