化学发动机跟航天飞机使用的发动机类似，都是用液氧和液氢作燃料。
The idea for the chemical engine is similar to that used on the space shuttle, liquid oxygen and liquid hydrogen.
在此基础上，建立了火箭发动机试验台液氢供应系统的健康评价体系。
Base on these, the health condition evaluation system of the liquid hydrogen supplying system of a rocket engine testing platform was set up.
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