锌铝合金涂层 3层防护，涂层厚度≥50μm 内层：锌锡合金涂层 中层：纳米材料封闭层 外层：铝环氧树脂层 Zinc-aluminum alloy mechanical coating 3 layers of protection, coating thickness ≥ 50 μm Inner layer: zinc-aluminum alloy coating Middle layer: nano material sealing layer Outer layer: aluminum epoxy resin layer
内梅花钉头 降低了对紧固件空隙和对工具的影响 Hexalobulaer socket pan head screws It reduces fastener voids and tool wear.
束尾钉 开口小 与板材贴合更紧密 Bunchy tail nail Small opening, it fits more closely to the plate.
反牙螺纹 最大限度的提升了抗拔能力 龙骨在牙槽内行进，不需要攻丝 Counter thread It greatly improves the ability to prevent pulling. The keel moves in the alveolar without tapping |