The diagram below shows how a simple water filter is constructed and how it functions to produce clean drinking water.
The diagram below shows how electricity is generated in a hydroelectric power station.
The diagram shows how electricity is generated by a hydroelectric dam.
The diagram below shows the stages and equipment used in the cement-making process, and how cement is used to produce concrete for building purposes.
The diagram below shows how coffee is produced and prepared for sale in supermarkets and shops.