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（） is the "physical examination train" that escorts the safety of high-speed emu, an important technical equipment for the comprehensive inspection of railway infrastructure, and provides technical support for the safety evaluation of high-speed railway operation and maintenance guidance of various railway bureaus.
（） is the "physical examination train" that escorts the safety of high-speed emu, an important technical equipment for the comprehensive inspection of railway infrastructure, and provides technical support for the safety evaluation of high-speed railway operation and maintenance guidance of various railway bureaus.
A、CRH2 bullet train
B、CRH5 bullet train
C、Test train
D、High speed inspection train
A.
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