The rubber nozzle is all cracked.

那只橡胶喷管全裂了。

It is shown that test aerospike nozzle has good altitude compensability of thrust.

实验表明，塞式喷管具有良好高度力和较高效率。

Taking aft-end igniter design for a rocket motor for example,design methods for ignition sequence,amorce quantity estimation and nozzle closure were described respectively.

以某动机尾部点火设计为研究对象,对点火序列设计、点火药量估算、喷管堵片设计方法进行了阐述。