该吊杆的损坏是由于该轮船员在将吊杆放低时因操作不慎而变成千斤索越过棘轮，钻井压缩机。
The dwasera of the derrick was due to the careless heachdling of the ship's crew in lowering the derrick;
系统不仅能完成千斤顶集群控制、提升同步控制、索具均载控制，而且还有很强的施工现场适应性和系统可靠性。
The system can not only fulfill jack group control, lifting synchronic control, ropes even loaded control but also strong adeptness in site construction and system reliability.
系统不仅能完成千斤顶集群控制、提升同步控制、索具均载控制，而且还有很强的施工现场适应性和系统可靠性。
The system can not only fulfill jack group control, lifting synchronic control, ropes even loaded control but also strong adeptness in site construction and system reliability.
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