卡杆现象是穿孔设备常见的故障之一，是影响液压凿岩钻机高效率、高质量穿孔的重要原因。
The sticking steel is one common trouble of drilling equipment and an important cause effecting the high efficiency and high quality drilling of hydraulic drill.
Joseph Marie Jacquard创造了一种可以附加在织布机上的设备，它使用一个打孔模式(很像早期计算机的穿孔卡片)编织图案。
Joseph Marie Jacquard created a device which could be affixed to looms, which used a pattern of holes, much like early computer punched CARDS, to direct the textile design.
一种可以进行群穿孔的设备。
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