【實用書籍app】Crane Hand Signals by Arxcis|最夯免費app-綠色工廠好玩App

Quickly learn the hand signals used to direct cranes. Crane Hand Signals by Arxcis Inc. is simply the best, most comprehensive teaching and reference tool used by crane operators. See detailed images and simple step by step instructions that help you learn each hand signal. Also includes comprehensive guidelines about crane hand signals.Includes hand signals for mobile cranes, overhead/tower cranes, and pedestal cranes.Translations for Spanish included.