Two routes can not be worn in the same tube, wire and heating, hot water, gas pipe between the parallel distance should not be less than 300mm, the cross should not be less than 100mm.
两路线不能穿同一管内，电线和暖气、热水、煤气管之间的平行距离不应小于300mm，交叉距离不应小于100mm。
That means that if you draw parallel lines in space, then they will remain the same distance apart along their infinite lengths instead of converging or diverging.
这意味着如果你在空间中作两条平行线，它们不会聚合或离散，只会一直保持相等的距离无限延伸下去。
Even with very tight conductor-to-conductor spacing, parallel runs of 5 to 6 times signal rise distance are required before crosstalk becomes a problem.
即使在非常小的线间距的情况下，在大于信号上升的距离5到6倍的距离以上串扰才会成为电路设计的一个问题。
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