中国老太婆多毛BBWHD

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          The concrete pump and its pipes

          2021-09-30 18:17:07

          After the concrete pump is connected to the conveying pipe, a comprehensive inspection should be carried out according to the concrete pump machine instruction manual, and it can be started for dry operation only after meeting the requirements. After 10 minutes of no-load operation, check whether each organization or system is working properly.

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          中国老太婆多毛BBWHD