All loose or damaged polyethylene shall be trimmed back to sound coating prior to cleaning, and the edge of the polyethylene shall be bevelled at an Angle of 30 with the steel surface.
所有损坏的聚乙烯应在清洁之前对其涂层进行测深，且聚乙烯边缘应与钢材表面成30度角。
A ledge is designed in the gap between the brick membrane and the outer edge for placing flower-boxes and providing access to the Windows from outside in case of cleaning.
砖模和外缘放置花箱之间设计有窗架，可以在清洁的时候提供到窗户外面的通道。
When cleaning a disc, users should wipe from the inside radically out to the edge.
当清洗光盘时，用户应由内向外，直到边缘，以放射状擦拭。
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