已经有次观看 wencong在2013-08-01发布

Channel：Tungsten 标签： Tungsten  steel,  Tungsten  steel  wire  mouth 

简介：Tungsten steel as materials, precision machining of tungsten steel wire mouth, its hardness up HRA90 above, all of the holes at both ends and inner mirror finish to protect Qin envelope not be scratched, with a high rigidity and hardness, easy to bend and plug, impact resistance, wear.