(1) The bottom of the jack should be flat and sturdy when used. Oil free wooden boards to expand the pressure bearing surface and ensure safety. Iron plates cannot be used instead of wooden boards to prevent slipping

　　(2) When lifting, it is required to be stable. After lifting the heavy object slightly, it is necessary to check for any abnormalities. If there are no abnormalities, the lifting can continue. Do not arbitrarily lengthen the handle or operate excessively.

　　(3) No overloading or superelevation. When a red line appears on the sleeve, it indicates that the rated height has been reached and the lifting should be stopped.

　　(4) When multiple jacks are working simultaneously, a dedicated person should be assigned to command the lifting or lowering process simultaneously. Support wooden blocks between adjacent jacks to ensure spacing to prevent slipping.

　　(5) When using a jack, always pay attention to the sealing and pipe joint parts, and ensure their safety and reliability.

　　(6) Jacks are not suitable for places with acid, alkali, or corrosive gases.