将网盖向下折，拉到位并与前板、侧板及隔板绞合在一起。
The net cover fold down, pull in place and with the front plate, side plate and plate twisted together.
在约束玻璃板的外侧表面上涂有光能吸收涂层，与该层接触的前盖中部是金属或非金属的薄层，以传递冲击波。
A metal or non-metal thin layer on the central area of front cover is in contact with said absorbing layer for transferring impact waves.
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