使用道具 舉報(bào)
546715894 發(fā)表于 2012-12-4 11:33 硬鉻機(jī)針是在針表面鍍一層金屬鉻.好處;鉻是金屬材料中一種比較尖硬材料.對(duì)針表面鍍鉻就是充實(shí)機(jī)針的表面硬 ...
本版積分規(guī)則 發(fā)表回復(fù) 回帖后跳轉(zhuǎn)到最后一頁(yè)
|小黑屋|手機(jī)論壇|Archiver|縫紉客,工業(yè)縫紉機(jī)維修問(wèn)答
GMT+8, 2024-12-23 21:47 , Processed in 0.042983 second(s), 7 queries , File On.
Powered by Discuz! X3.3
© 2001-2017 Comsenz Inc.