"external supplies" is a correct and usable phrase in written English.
It is most often used to refer to resources and materials obtained from outside sources. For example: "Our company has been relying on external supplies to meet our production needs."
The European energy market is strongly dependent on its external supplies.
This personal symbiotic coexistence is the result of progressive enrichments in microorganism diversity through external supplies.
The final result of this calculation is a decrease of external supplies of energy carriers.
The designs also allow integration of stretchable, inductive coils to enable charging through external supplies without the need for physical connexions.
In many practical cases such as implanted devices the ability to charge the battery without establishing physical connexions to external supplies can be valuable.
Most industrialised countries are in addition becoming more and more dependent on external supplies of conventional energy carriers, i.e., fossil fuels.
He works in Parsippany, N.J., where he is the director of external supply for North America.
Barabasz, A. et al. Metal accumulation in tobacco expressing Arabidopsis halleri metal hyperaccumulation gene depends on external supply.
Liquid propellants are fuels which do not require external supply of oxygen for combustion.
But the fact that the oxidizing bacteria also have an internal source of sulfide from their symbionts means that they are not dependent on an external supply.
Catalysis depends on external supply of electrons for Cu2+ reduction, sources of which can be small-molecule redox mediators or partner redox-proteins15,16,17.
