He pikitanga matamua 郑州 , he pikitanga hidrauliki, 郑州 he pikitanga hidrauliki, 郑州 he pikitanga hidrauliki, he pikitanga tapatahi, he pai, he nui rawa te utu He kaha rawa te mahi, he teknolojia whakaneke noa atu. Hohoro mai 郑州 he hunga hou, he hunga tawhito e haere mai ana ki te whakatakoto whakaaro, ki te rapu