The new tree-climbing machine is suitable for various seeds harvesting in forest regions, the treemaintenance in the forests and the operation of electric wire poles.
座式上树设备广泛适用于林区各种母树的采种采果、森林维护以及电力部门外线作业。
2
This scheme lessens efficiently multicast traffic in network, and reduces multicast treemaintenance costs, but does not cause multicast data delivery to incur too large delivery delay.
该方案有效地减少了网络中的多播通信量并降低了多播树的维护代价，却没有给多播数据传输带来太大的延迟。
3
Using photovoltaic cells, the Air Tree produces a substantial amount of energy, which is then sold back to the local electric companies, the profits being used for maintenance of the structure.