Abplanalp used plastic in a model that could be mass-produced, lowering the price per valve from 15 cents to 2 1/2 cents.
Abplanalp used plastic in a model that could be mass-produced, lowering the price per valve from 15 cents to 2 1/2 cents.
The model could be mass-produced with plastic which would lower the price per valve a whole 15 cents to 2 1/2 cents.