国产日韩欧美高清-亚洲精品乱码-97人人模人人爽人人少妇-少妇裸体挤奶汁奶水视频-黑人操日本女人视频-欧美h版电影在线观看-激情视频国产-午夜一区二区视频-午夜电影在线播放-国产精品久久久久国产a级-精品熟女碰碰人人a久久-茄子视频懂你更多在线观看-久久性生活-久久不卡av-欧美人与性动交α欧美精品-高清午夜福利电影在线-久久网中文字幕-中文字幕免-www五月婷婷-日韩一级黄色
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冷拉圓鋼是什么材質的？
發布時間：2020-03-04 15:37??禁止復制或轉載本站任何內容，特此聲明！??點擊：
冷拉圓鋼
也稱作冷拔圓鋼、冷拉元鋼、冷拉園鋼、光圓，是冷拉型鋼的一種。
冷拉圓鋼應用于范圍:
產品應用于: 五金工具，汽車配件，標準件，緊固件 普通軸類，機械制造，輕工，五金，標準件，自行車，汽車，摩托車，紡織機械，變壓器等其他機械行業。
冷拉圓鋼與圓鋼區別:
冷拉圓鋼是一種精度很高的圓鋼，材質是經過“調質”處置的，可以必要用來做軸，不必須再加工的2、對應的普通圓鋼，就是我們少見的用作建筑的圓鋼，供應的熱處理狀態是“正火”，無論是尺寸精度還是材質都是普通級別的。不管是冷拉圓鋼或是圓鋼其形狀都是圓形的,但是冷拉圓鋼表面很平滑,尺寸精度很高,它的機械性能高,由于尺寸精度高不經加工可必要用于。
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