1·Case hardened: a case hardened fastener is a fastener of ferrous material having a surface which has been made harder than the core.
表面硬化：表面硬化的紧固件是黑色金属，其表面经过处理后比内心硬度要高。
2·Moreover, we also export some kinds of fastener products.
另外，我们也出口各类紧固件产品。
3·We provide reliable fastener at a reasonable price.
我们提供可靠的紧固件以合理的价格。
4·The factory technique strength is strong, equipment is well-found, can accept each kind of high quality carbon steel, stainless fastener.
本工厂技术力量雄厚，加工设备齐全，能够承接各类高质量、高标准的碳钢、不锈钢紧固件。
5·Therefore, we strive and develop day by day, and now we are the leading fastener company among industry.
公司在激烈的市场竞争中，不断的发展、壮大，成为国内紧固件行业的佼佼者。