A circular hole equals to the cylinder of the jointing component and gaps through which the nylon can fall down are reserved in the vicinity of the opposite Angle at the bottom of the flat triangle.

在平面三角底边对角的近处，预留下与连体构件的圆柱体相当的圆洞和尼龙丝可以落下的缝隙。

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The house isn't going to fall down, we're not going to bash a hole in the cellar wall and find the beer turns green.

BBC: Cumbria