A large amount of amorce was needed.

需要大量的起爆剂。

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.

以发动机尾部火研究对象,对火序列、火药量的估算、喷管堵片的方法进行了阐述。