题海让大学四年没有难题
白天模式登陆

题目详情

单选题 Which part of a conventional cargo gear rig provides for vertical control and positioning of a boom? ( )

A. Cargo whip

B. Gooseneck fitting

C. Spider band

D. Topping lift

默认课程课程封面

学科:默认课程

时间:2026-05-24 08:16:17

Copyright © 2022 津ICP备2021001502号