合理的分缝能保证坝体的安全和施工的速度，减少施工工期。
The reasonable crack design can assure security of dam, velocity of construction and reduce construction time.
平行缝焊技术是一种安全、高效、可靠的焊接方法。
Parallel seam welding technology is a safety, effective and reliable method.
请注意，中轴上的螺丝高于接触岩面的位置，正是这点提供了(大约)4：1的机械势能，即使是在光滑、平行的岩缝中，也保证了凸轮的安全性。
Notice that the axle bolt is higher than where the cams touch the rock. This is what provides the (approximately) 4:1 mechanical advantage that keeps the CAM secure, even in a smooth, parallel crack.
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