selfdrivevt.自动推进(自动步进)n.自动推进(自动步进)selfn.自己；本性；自我pron.我自己；你自己；他或她自己adj.始终如一的；同一类型的；性质不变的v.近亲繁殖；自花授粉self-diagnostic facility自动诊断设备self rectified transmitter自整流发射机self-healing performance自愈能力Self - excited Vibration自激振动self-recuperating burner自身预热烧嘴self-simulating equation自模拟方程self-diagnostic function自诊断功能self-propelled sprinkler自走式喷灌机self-nanocrystallization自纳米化self-maintenance circuit自保持电路