研制成合适的自动点火装置和火焰监测器，保证了安全生产。

A new automatic igniter and flame detector have been developed to insure the production salty.

youdao

研制成合适的自动点火装置和火焰监测器，保证了安全生产。

A new automatic igniter and flame detector have been developed to insure the production salty.

youdao