通常的双绞卷扬机当采用的齿轮箱增至二个以上时则绞盘的高度需增高,而且轴作平行配置,致使卷扬机体积较大。英国一家牵引设备公司的约翰·韦布以船用绞盘为基础并在装置的前端采用特殊的工程技术,开发出只需要一个齿轮箱的同轴双绞盘卷扬机,从而使绞盘的高度得到控制。 The usual winch winch when the use of more than two gearbox winch height need to be increased, and the shaft for parallel configuration, resulting in a larger hoist volume. John Webb, a British towing equipment company based on a marine capstan and using special engineering techniques at the front of the unit, developed a coaxial winch with only one gearbox to control the height of the winch.