flexible retractable roof
Retractable Roof
开合屋顶
开闭屋盖
活动屋盖
开合屋盖
开启屋盖
可移动车顶
Retractable Roof Structure
large-span roof structures
long-span canopy roof structures
Changing flat roof to slope roof
flat-roof-to-slope-roof
roof pressure roof weight
extendible and retractable dog
integrally retractable alternative cutting element
retractable
伸缩
可
收放
开合
能缩进的
伸缩式
收放式
可伸缩的
可缩回的
可收回
可伸缩
retractable actuation mechanism
retractable core barrel