The construction will inevitably have to use all kinds of lifting equipment and lifting handling equipment before use, we must carry out strict inspection of various equipment, such as the bolt is loose, whether the switch is sensitive and reliable safety device, each project is completed, clean, to rust, rust treatment equipment, prolong the service life of the equipment before use must be installed, the installation should walk on the oil, reduce friction and increase the sensitivity, when we use the equipment, not only to skilled manipulation, but also know how to cherish.