Employees need to go through correct training and qualification to reduce threats and adhere to crane safety and security please note. https://www.zanichelli.it/login/zd-login.php?zanitTargetUrl=aHR0cHM6Ly93d3cucXVlc3Rpb24ta3NhLmNvbS91c2VyL3Nob3B3cmVuMQ