In recent years some new profile steels are used for main girder of domestic made electric single girder overhead travelling crane.
近年来国内电动单梁起重机主梁采用一些新截面型式。
In recent years some new profile steels are used for main girder of domestic made electric single girder overhead travelling crane.
近年来国内电动单梁起重机主梁采用一些新截面型式。
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