portal crane meaning in English
龙门吊
龙门起重机
龙门式起重机
龙门型起重机
门形起重机；门式起重机
门座起重机
轻便起重机
Examples
- Repairing technigue rules for the harbour portal crane
港口门座起重机修理技术规范 - Repairing technique rules for the harbour portal crane
港口门座起重机修理技术规范 - Specifications for the harbour portal crane
港口门座起重机技术条件 - Safety code for the harbour portal crane
港口门座起重机安全规程 - Overhead travelling cranes and portal cranes with eahs : controls
桥式起重机和龙门起重机.控制装置