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。

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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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