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大趨勢下的逆流-以舌根(符號略)-聲母為探討的起點
Adding a velar nasal ((the symbol is abbreviated)-) in which a word has a zero initial (o-) originally as a brand-new initial is the mainstream of Chinese linguistic development. This phonetic traitExpand
Power supply device of electric motor coach and electric motor coach equipped with such power supply device
The utility model provides a power supply device of an electric motor coach and an electric motor coach equipped with such power supply device. The power supply device can enhance continuous voyageExpand