N'afọ a, ọtụtụ mpaghara ala anyị bụ mmiri ozuzo, ugbu a ọ dị anyị mkpa ịrụ ezigbo ọrụ nke igbochi nchara makangọngọ lever ngọngọ. Enwere ike iji ngọngọ lever n'ọtụtụ oge, mana ọ dị mkpa izere ijingọngọ lever ngọngọ n'oge mmiri ozuzo iji meziwanye ndụ ọrụ nke ngọngọ lever ma jigide arụmọrụ ojiji nke ngọngọ lever. Mee ọrụ mmezi maka lever hoist na ihu igwe. Ihe nkengọngọ lever is metal, and most of the metal has the defect of rust. Doing good maintenance work can avoid the danger of rusting on the lever hoist and extend thengọngọ lever. The service life improves its operational safety. If the project is more urgent and the amount of precipitation is particularly low, people can consider building a canopy for lifting work, but it must be maintained in time after use.
