The in-line initiators are factory assembled into firing assemblies which are attached to the a 2 foot shock tube bitter end and securely mounted on the spool flange.是什么意思_The in-line initiators are factory assembled into firing assemblies which are attached to the a 2 foot shock tube bitter end and securely mounted on the spool flange.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句