... down when vertical. 2. Aluminum billet in vertical Wells hoisted out of, level down, can be complete hoisting level . 3.Clamping ... , In the hydraulic cylinder oil by hydraulic lock in and out of the mouth, ensure malfunction, can keep hydraulic cylinder pressure. ... sling manufacturing. In after-sales aspect, insisted in the principle of “Quality First ,Customer Highest”.Think to customer want, anxious ...