low-level slewing tower crane中文什么意思

• [机] 下回转塔式起重机

• tower slewing crane:    塔式回转吊机; 塔式回转起重机; 塔式旋臂起重机
• slewing crane:    回臂起重机; 回转式起重机; 旋臂起重机；回转式吊机; 旋臂式起重机; 旋转式吊车; 转吊机; 转动起重机
• electric slewing crane:    电动旋臂起重机
• electricwall type slewing crane:    电动墙式旋臂吊车
• fixed pillar slewing crane:    定柱旋臂起重机