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Engine Bell

1、部分的底部的钟形喷管

登月舱降落部分和起飞部分的燃料和氧化剂罐都被加大，降落部分的底部的钟形喷管（engine bell）也被加长。登月舱上还增加了普通电池和太阳能电池板以增加电力。

fire engine bell救火车铃

engine bell housing发动机警铃壳

bell crank engine钟形曲柄发动机

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