Much of the shuttle is protected by a Rotating Service Structure, a shell-like covering that guards against weather, he added.
航天飞机的大部分受到一个旋转服务结构的保护，它类似于一个阻挡不良气候的覆盖物，他补充说。
The utility model has the advantages of simple structure, less parts, no faults and worries of pedal falling, locking, inefficient rotating, etc. , convenient maintenance and long service life.
本实用新型结构简单、零件少、无脚蹬脱落、卡住转动不灵等故障和烦恼、维修方便，使用寿命长。
The utility model has the advantages of simple structure, less parts, no faults and worries of pedal falling, locking, inefficient rotating, etc. , convenient maintenance and long service life.
本实用新型结构简单、零件少、无脚蹬脱落、卡住转动不灵等故障和烦恼、维修方便，使用寿命长。
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