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.
缝顶端关闭如果你想，或者只是脚它关闭了安全销。
Sew the top shut if you want, or just pin it shut with a safety pin.
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