对厂内生产的紧固件进行型式试验的翻译：Plants production of fasteners for type testing 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Factory production of fasteners for type testing

Plants production of fasteners for type testing

The fastener produces which to the factory in carries on the pattern experiment

For in-plant production of fasteners for type pilot

Plants production of fasteners for type testing