Audio enhancing features include Hyper Surround sound and dual front-firing, variable audio-output speakers that can be turned on or off from the TV menu.
音频增强功能包括超线程环绕音效和双前线射击，可变音频输出发言者认为，可以开启或关闭，从电视菜单。
2
Direct ignition coils, dual-electrode spark plugs and high-output magneto deliver extremely accurate, reliable firing.
直接点火线圈，双电极火花塞和高输出的磁提供极其精确，可靠的点火。
3
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.