气开关

Common warning signs of middle back pain include having a tender spot in the chest that switches on and off, needing to struggle with your breath when breathing normally, having chest pains while taking a deep breath, and also feeling pain in the chest when sneezing or coughing.

常见的警告标志，中背部疼痛，包括有一个投标现场在胸部开关和关闭，需要的斗争，与您的呼气时，呼吸正常，胸部疼痛，同时考虑深呼吸，也感觉疼痛的胸部时，打喷嚏或咳嗽。

Can be seen that the valve in this operation is the role of gas line switch to change the air flow flowing through the line.

可见，阀门在这种操作中的作用是开关气路，改变气流的流经路线。

Digital simulation is an important step for torpedo turbine engine design. This paper investigates the modeling and simulation of unclosed cycle and partial flow two-stage impulse torpedo turbine in design condition and two non-design conditions. The control modes of turbine in non-design conditions are discussed.

进行鱼雷涡轮动力装置数字仿真是设计涡轮机的重要步骤，为此，该文针对鱼雷涡轮机设计和研制的需求，采用理论分析、经验推导和实验研究相结合的方法建立了鱼雷开式循环部分进气纯冲动式复速级涡轮发动机设计工况及2 种常见变工况的数学模型，着重讨论了变工况过程涡轮机的调节控制方案，提出了简便易行的开关喷嘴控制方法，并对其进行了数字仿真研究。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。