Jack stand is used to support the object, usually used in conjunction with the hydraulic jack. When the Jack lifts the object, the security support is placed in the appropriate position for a long time to support.
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In principle, the hydraulic jack is based on Pascal principle, that is, the pressure of the liquid is the same everywhere, so in a balanced system, the pressure exerted on the smaller piston is relatively small, and the pressure exerted on the larger piston is also relatively large, which can keep t