瓶颈口 meaning in English

bottle neck

Focus on capacity improvement and bottle - neck tool management
合理分配及控制生产能力及瓶颈口的出现。
Starting up the prime mover with a high speed quot; villager autonomy quot; breaking the bottleneck of rural economic development
的原动力一举突破农村经济发展的瓶颈口
Gas cylinders . taper screw thread for valve stem and cylinder neck assembly . nominal diameter 28 . 3 mm , taper 3 25 , 14 tpi , whitworth form
气瓶.阀门堵头和气瓶颈口组件用锥体螺纹.公称直径28 . 3毫米，锥度3 25 ，每英寸螺纹齿数14 ，惠氏螺纹