The advanced hoisting technique and control method of prefabricated box girder over sea including spreader gear design, floating crane improvement and transport barge have been expounded in details.

详细阐述了预制箱梁海上新的吊装工艺和控制方法，包括吊具设计、浮吊改造、运输驳改造。

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In this paper, constructed the spreading test system of spinning disc spreader by combining single-disc spread model of spinning disc spreader with its control analysis software.

本文通过单圆盘式抛撒模型和其控制分析软件的有机结合，构建了圆盘式抛撒试验系统。

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