A large amount of amorce was needed.

需要大量剂。

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.

以某型号发动机尾部点火设为研究对象,对点火序列设、点火药量估算、喷管堵片设方法进行了阐述。