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1. The cartridge indicator on the gun is a crucial part of the firing mechanism.
枪上的弹匣指示器是射击机制中至关重要的一部分。
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2. During the testing phase, the engineers used the cartridge indicator to monitor the performance of the new engine.
在测试阶段，工程师们使用弹匣指示器来监测新引擎的性能。
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3. The cartridge indicator was designed to provide immediate feedback after each shot, ensuring accuracy and safety.
弹匣指示器设计用来在每次射击后提供即时反馈，确保准确性和安全性。