The paper introduced two methods of fin cutting in precision hole and dual gear (or gear with shifter fork) slot.

介绍了精密孔内和双联齿轮或带有拨叉槽齿轮槽中去毛刺的两种方法。

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There are fin cutting devices to produce serrated fin tube and cutting speed is controlled automatically depend on welding speed of tube dancer.

开齿机将翅片切开，可生产出锯齿形翅片管。剪切速度，根据辊子输送管子后焊接的速度自动控制。

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The paper introduced two methods of fin cutting in precision hole and dual gear (or gear with shifter fork)slot. It is testified simple?useful and effective through practical use.

介绍了精密孔内和双联齿轮或带有拨叉槽齿轮槽中去毛刺的两种方法。经实际使用：简单、可行、效果好。

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If you watch closely, you can see them from the shores of Istanbul: The sudden flash of a dark grey dorsal fin cutting through the water.

NPR: Dolphins Dodge Danger in the Bosphorus Strait