The cross sectional transitions are smooth to avoid dead spaces and minimize pressure loss.
横截面的平滑转变避免了死空间，并且使压力损失达到最小。
Stable performance, no dead point, smooth speed adjustment due to optimization design.
经过优化设计，电机工作性能稳定，无死点，调速平稳。
Billy: Well, I use the file to smooth the dead skin on my feet.
比利：嗯，我用锉刀来锉我脚上的死皮。
Billy: Well, I use the file to smooth the dead skin on my feet.
比利：嗯，我用锉刀来锉我脚上的死皮。
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