哪里有用于加工美制螺纹3/4-10UNC、7/8-9UNC的丝锥购买？

[table=98%] [tr] [td] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px] [size=14px][br]哪里有用于加工美制螺纹3/4-10UNC、7/8-9UNC的丝锥购买？[br][br]请问中国6H，7H的的螺纹相当于[size=14px][u][url=http://www.chinafastenerinfo.com/gb/info_list.aspx?kind=2&action=search&keyword=%e7%be%8e%e5%88%b6][color=#000000]美制[/color][/url][/u][/size]螺纹哪个级别的精度？对应的丝锥精度是多少？价格多少？[/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/size] [/td][/tr] [/table]