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The approach ramp is a double deck roadway structure.
该引桥坡道是双层公路桥。
youdao
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Base structure: double deck multistage lifting or skid-mount type.
底座形式：双层多级升降或撬装式。
youdao
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Base structure: double deck multistage lifting or skid-mount type.
底座形式：双层多级升降或撬装式。
youdao