ʻO nā mea maikaʻiʻo Greats Hydraulic Aia kahi cylinder cylinder e kāohiʻia e kahi vasnoid balve e hoʻopili i ka hook movable. I ka manawa i mālamaʻia ai ka cylinder cylinder i waho a hoʻihoʻi paha, hiki i ka wikiwiki ka wikiwiki e hopu a nalowale paha i ka PIN o kāu mau hoʻopili. ʻO ka hana maikaʻi loa o kahi hui wikiwiki loaʻo Hydraulic