Solid propellant engine systems are basically less flexible in operation than liquid or hybrid propellant systems.

固体推进剂发动机系统的可调性基本上比液体或混合型的要差。

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Solid propellant engine systems are basically less flexible in operation than liquid or hybrid propellant systems.

固体推进剂发动机系统的可调性基本上比液体或混合型的要差。

youdao