The charge utilization ratio is high for multi-point ignitiontube experiments in a high-pressure gun, but the chamber pressure wave is high.
某高膛压火炮试验中发现多点点火方案的装药利用率较高，但膛内压力波较大。
2
To start the engine, one must first light the small flame beneath the hot ignitiontube and crank the engine once using the crank; these preparations take only a minute.
要启动发动机，首先得点燃热管，再转动曲柄轴，发动机便启动，这些准备工作只需一分钟。
3
Electrical wire is sheathed in metal fire-retard tube, to prevent ignition caused by fire in battery test.