There exists a saddle type zone in the hydraulic moment curve of axial-flow pump blades which corresponds to the saddle zone of discharge-headcharacteristic curve of the pump.
轴流泵叶片水力矩随流量变化的关系曲线存在一个马鞍区，并与流量-扬程曲线的马鞍区相对应。
2
According to ding Wenjun, the most remarkable feature of his son is that he keeps a cool head, an important characteristic for a snooker player.
父亲丁文钧说，儿子最突出的一点就是能保持头脑冷静，对于台球手而言，这是一个至关重要的特点。
3
India, for example, exports not just garments and cheap electronics-characteristic of many countries with similar levels of income per head-but ships, petrochemicals, steel and business services.