I am the youngest girl in the factory.
Today, I will show you our product analysis laboratory.
This is our spectrometer specially used for product analysis.
This is an instrument originally imported from the United States. 
It can molecularly detect the various elements required in the product with very high precision.
Each batch of our products can only be sent out after passing the test of this instrument, so we can guarantee the quality of the products and provide customers with high-quality products.
Follow me, the youngest girl in the factory
What else do you want to see, let me know in the comment section!