Two hydraulic steel gates are raised, so as to seal the gondola off from the water in the canal basin.
两个液压钢制闸门抬高，以将贡多拉与运河盆地里的水隔离开。
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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.
Hydraulic system high reliability and excellent performance, easy maintenance, hydraulic components and seal famous at home and abroad, use cycle chosen long, safe and reliable operation.