The norwegian cut can provide more dependable advance per round than the plough cut .

挪威掏槽与楔形掏槽相比，可以提供更可靠的每次爆破的进度。

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The loosening holes outside the plough cut are also drilled at an Angle which improves the breakage possibility.

在楔形掏槽眼外侧的扩槽眼也要有角度以改善爆破效果。

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The loosening holes outside the plough cut are also drilled at an Angle which improves the breakage possibility.

在楔形掏槽眼外侧的扩槽眼也要有角度以改善爆破效果。

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