Introduction: Key skewers (lifter) are often used to remove theundercut in the side. When the plate pushes forward, remove the liquid core dimove towards pushing the details to remove the undercut section.A system of pegs pushed the skewer base consists of the following components:-Key skewers-U joints-T couplingThere are many types of latches push skewers from different producers. Latchpush the skewer is commonly used. The angle of the handle push the skewers should not exceedtoo° because of weak push angle will do the opposite, if using small angle (1 ÷ 5°) willdraining journey restrictions undercut.
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