Three styles existed: using gold, silver or copper thread to sew the jade slip together.
有三个风格仍然存在：用金、银、铜丝线把玉片缝在一起。
Simple introduce the XDSL accessing network technology based on the copper thread, and has carried on the more detailed introduction to SDSL's technology.
对基于铜线的接入网技术XDSL做了简单的介绍，并对SDSL技术进行了较详细的介绍。
HIMOD flagship series USES interactive "type v" coil, the internal thread copper tube and punched slotted fin, and heat transfer efficiency is higher than the traditional coil unit.
HIMOD系列旗舰型采用了交互“V型”盘管，采用了带内螺纹的铜管及冲缝型翅片，比采用传统式盘管的机组有更高的传热效率。
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