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关注：1
2013-05-23 12:21
求翻译：T and SM grades of Sucker Rod Couplings. Both grades are manufactured with cold worked pre-stressed, roll-formed threads. This round root form is substantially stronger and provides better fatigue resistance than conventional cut threads. The threads of both grades of couplings are coated for anti-galling properties.是什么意思？ 待解决
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- 离问题结束还有
T and SM grades of Sucker Rod Couplings. Both grades are manufactured with cold worked pre-stressed, roll-formed threads. This round root form is substantially stronger and provides better fatigue resistance than conventional cut threads. The threads of both grades of couplings are coated for anti-galling properties.
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2013-05-23 12:21:38
T和SM级别的抽油杆接箍。这两个成绩都与冷加工预应力，滚轧成型线生产。这一轮根的形式是大幅走强，并提供比传统的切割线更好的抗疲劳性。两个档次联轴器的螺纹涂覆抗擦伤性能。
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2013-05-23 12:23:18
抽油杆联结T和SM等级。两个等级制造与寒冷工作的预应力，卷被形成的螺纹。这个圆的根形式比常规裁减螺纹是极大地更强的并且提供更好的疲劳抵抗。联结两个等级螺纹为反难堪的物产是上漆的。
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2013-05-23 12:24:58
T和抽油杆联结SM等级。 两个等级制造与寒冷工作的预应力，滚动被形成的螺纹。 这个圆的根形式比常规裁减螺纹是极大地更强的并且提供更好的疲劳抵抗。 联结两个等级螺纹为anti-galling物产是上漆的。
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2013-05-23 12:26:38
T 和 SM 等级的抽油杆接箍。这两种牌号的制造与冷工作预应力、 滚压成型线程。此圆根窗体极大地强，并提供更好的疲劳耐比常规切削螺纹。这两个职系的联轴器的线程被涂层的抗粘扣性能。
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2013-05-23 12:28:18
正在翻译，请等待...
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