Red Seal endorsement is also available to qualified mobile crane, tower crane and mobile crane (hydraulic) operators upon successful completion of the interprovincial Red Seal examination.
红印章背书对于通过跨省红色钢印的考试的合格的移动式起重机，塔式起重机，移动式起重机(液压)操作员也可用。
The experiments of the wallop of hydraulic shock device and the lifting moment of tower crane show that the mode is effective and reliable.
液压打桩锤冲击力和塔式起重机力矩实测研究证明该方法可行、可靠。
The experiments of the wallop of hydraulic shock device and the lifting moment of tower crane show that the mode is effective and reliable.
液压打桩锤冲击力和塔式起重机力矩实测研究证明该方法可行、可靠。
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