替换一般标准型气切管。

To replace a standard tracheostomy tube.

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发动机进气调节系统是为发动机的测试建立一个标准的大气状况环境。

Engine air-conditioning system is used to establish a standard air condition environment for engine test.

youdao

发动机进气调节系统是为发动机的测试建立一个标准的大气状况环境。

Engine air-conditioning system is used to establish a standard air condition environment for engine test.

youdao