For inspiration, watch the coaches prepare for daily tourist performances, in which they snap iron bars with their heads and break glass by throwing a pin at it.
观看教练准备日常教程的表演也是一种激励，他们会用头撞断铁棒，并投掷大头针击破玻璃。
The guide vane safety device include three kinds of structures, the destructive structure concerning shear pin and snap pin;
导叶安全保护装置主要包括：破坏性结构，剪断销、拉断销；
The guide vane safety device include three kinds of structures, the destructive structure concerning shear pin and snap pin;
导叶安全保护装置主要包括：破坏性结构，剪断销、拉断销；
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