Full bore pipeline ball valves the channel diameter and the same diameter, only a small fluid resistance, but also easy to clean pipes.

全通径球阀的通道内径与管线内径一致，不但流体阻力小，也便于管道清理。

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The channel is only a few centimeters in diameter, but that is wide enough for electrons to follow the channel to the ground in the visible form of a flash of lightning.

这个通道的直径只有几厘米，但它的宽度足以让电子以闪电这样看得到的形式随着通道到达地面。

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The original design of valve plate to open the gas valve is hanging in the channel, the possession of an effective diameter about 20%.

而原设计阀板打开是悬于阀体的气体通道内，占有有效通径20%左右。

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