The status of various reduction motors of pumping unit has been analyzed, and a research on design of a kind of three groups duplicategear reduction motor has been made.
分析抽油机上使用的各种减速电机的现状，对抽油机的三组双联齿轮减速电动机设计进行了研究。
2
Blizzard is implementing a "Gear Manager", which seems to duplicate the simpler functions of addons like Outfitter.