Elevator, irin okun scrapping bošewa Awọn aaye akọkọ ti apẹrẹ itanna ni elevator ati yara ẹrọ Ẹrọ aabo yoo bẹrẹ nigbati elevator jẹ iwọn apọju Kini awọn ibeere ti ẹnu-ọna elevator? Elevator lubrication ati awọn ibeere iṣẹ fun epo lubricating Awọn ibeere pupọ lati ni oye nipasẹ awọn olumulo elevator