当定压生产时，井筒压降损失在生产初期对产量影响较为明显。
Under production with constant pressure, the pressure loss in the wellbore has obvious effect on the production rate at the initial period.
这两种电路皆能提供卓越的一致性，但是具备相对较简单的线路的话，会在跨越驱动TFT时带来显著的降电压(和电源损失)。
Both of these circuits result in excellent uniformity, but, as with simpler circuits, result in a significant voltage drop (and hence power loss) across the drive TFT.
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