gluewater

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

应该是老乡的杰作，胶水的痕迹也明显。

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

分析其原因，发现气密性并不好，加热处的胶水并不能保证密封性。