Pay attention to the speed when choosing a ring chain electric gourd. Because there are many types, many styles, many styles, and different applications and industries. It is mainly to see if the increase in electric gourd is matched to the machinery and equipment used, or the use of construction sites and workshops. For example, the slow electric gourds of the group hanging are used to increase a heavier tank with 10 tons of electric gourds to dozens of units. At this time, the synchronization performance of the electric gourd group is required. When the tank is raised, it is required to increase the height of a single steel plate, which is not high in speed. Slow speed and improvement of synchronization for a long time are more applicable. For example, if you use it frequently in the workshop, you need to increase the goods frequently, and you do n’t need a group crane, so you can choose a suitable electric gourd according to the requirements.