适当施加压力于煞车绳可以很安全的让伞加速与减速。
By having some pressure on the brakes you can speed up and slow down as well.
介绍了应用人机对话技术、PLC和全数字直流调速器，对依靠调整减速箱挡位来设定钢丝绳生产捻距和筐篮转速的老式机械传动的合绳机进行改造。
Applying interactive interface, PLC and full digital DC speed adjusting system to update old mechanical closer that use gearbox Settings to change the layer of wire rope and the speed of cage.
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