The external surface of the shell occasionally shows faint ribbing.
They grow scattered or in groups, and are covered on their external surface with short hairs.
They are glazed on the external surface only, with a clear lead glaze.
All of the ship's external surfaces were painted in Navy camouflage colors.
The external surface is smooth, ornamented only by growth lines.
The temple's external surface is covered with coal dust and looks musty.
To solve this problem, they are often placed on the external surfaces of vehicles.
With so much blood going to the external surface of the body, relatively less goes to the active muscles, the brain, and other internal organs.
A working fluid is provided on the external surface of a vertical body (Figure 4).
All external surfaces of the hotel building are covered with green plants.