Window and door openings in vertical walls are designed to resist flooding or allowing for easy replacement for new ones. Roofing is copper colour aluminium sheet.
垂直墙壁上开有窗和门，设计来抵御洪水，易于用新的替换。屋顶是铜色铝板。
2
Strip Resist: The hardened dry film is stripped from the copper leaving the desired copper pattern reproduced from the artwork.
去膜：蚀刻后将抗蚀层干膜去除，得到所需的裸铜电路图图。
3
Can resist the air and seawater erosion, have good electric conduct perfemance . Can be used in red copper jointing.