The dual-bell nozzle has an inflection point (12) between the first stage nozzle and the second stage nozzle.
双钟形喷嘴具有位于第一级喷嘴和第二级喷嘴之间的拐点 （12）。
When numbers of the inner nozzle are enough, plug nozzle has less size, less weight and higher thrust efficiency than the bell nozzle under same area ratio.
在单元数足够多时，环簇式塞式喷管可比相同面积比的钟形喷管的尺寸更小，重量更轻，推力效率更高；
By employing the gaseous oxygen as oxidizer and gaseous hydrogen as fuel, hot-firing tests were performed for aerospike nozzle and dual-bell nozzle test engines with altitude compensating features.
采用气氧作氧化剂、气氢作燃料，对具有高度补偿特性的塞式喷管和双钟型喷管进行了点火热试。
The bell of the motor nozzle, which was machined from a single piece of steel, is visible at the aft end of the rocket.
钟的发动机喷管，这是加工从单一的一块钢，可见在尾部结束火箭。
The nozzle bell has an integrally machined stiffening ring for structural reinforcement.
喷嘴钟一整体加工加劲环的结构加固。
By allowing the influence of ambient pressure to be transmitted to the nozzle wall, the aerospike yields a net thrust advantage over conventional bell-type nozzles.
允许的影响，环境压力，以传送给喷嘴墙，气动收益率，净推力的优势，与传统的罩式喷嘴。
By allowing the influence of ambient pressure to be transmitted to the nozzle wall, the aerospike yields a net thrust advantage over conventional bell-type nozzles.
允许的影响，环境压力，以传送给喷嘴墙，气动收益率，净推力的优势，与传统的罩式喷嘴。
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