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Ô­ÎÄCracks begin at corner toward horizontal due to lift force from die taper.
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hanches: ½ð±Ò+2, ºÜרҵµÄ»Ø´ð~~~ 2013-05-05 10:25:29
Cracks begin at corner toward horizontal due to lift force from die taper.
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¹ØÓÚTap ºÍ die
Taps and dies are cutting tools used to create screw threads, which is called threading. A tap is used to cut the female portion of the mating pair (e.g., a nut). A die is used to cut the male portion of the mating pair (e.g., a screw). The process of cutting threads using a tap is called tapping, whereas the process using a die is called threading. Both tools can be used to clean up a thread, which is called chasing.
²Î¿¼£ºhttp://en.wikipedia.org/wiki/Tap_and_die
         http://www.chinabaike.com/english/en/684772.html
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