boom crane

• 臂式起重机,伸臂起重机,桁梁起重机,吊杆起重机

boom crane的用法和样例：

例句

1. Manual Single-beam Crane is configured by crane span structure, cart driving device and manual monorail car and other major parts.
   手动单梁起重机系由桥梁，大车传动机构，手动单轨行车等主要部分组成，大车行车及货物起重均用手拉链条驱动。