... articulating boom lift GTZZ12 GTZZ15 GTZZ18 Articulating Boom Lift Features n Auto-leveling platform, with plus-minus 180° rotation.n 130° to 140° vertical movement of short boom ... station1.1. Proportional control is employed for boom elevation, platform rotationand traveling.1.2. ... ultaneously control movements of travel, turretrotation, boom elevation, telescoping without releasing the f ootswitch1 ...