Milling grooves on aerospace rocket-engine-nozzle surface is an important process.

铣槽加工是大型航天火箭喷管制造中的关键工序。

youdao

Milling grooves on aerospace rocket-engine-nozzle surface is an important process.

铣槽加工是大型航天火箭喷管制造中的关键工序。

youdao