First, before starting to lift the steel pliers must be touched within the scope of things clean up to prevent the operation to touch the steel plate to fall.
Second, the lifting of the operator to prohibit the sudden brake or not uniform lifting. Sudden braking and uneven lifting will cause the steel plate shaking. Shake the steel plate center of gravity instability, easy to fall from the lifting clamp fall, injured the following people.
Third, prohibit the use of steel plate lifting clamp lifting rust or surface attached to the oil object. Rusty object structure loose, lifting process if scattered, it will hurt the operator and smashed around things, the consequences could be disastrous. Surface attached to the oil object, steel clamp with its contact lifting, the friction between the two small, easy to fall off.