The picture showed a ship about 30-yards long with a rather narrow diameter.
Using duct with a narrower diameter would restrict the airflow.
Looking up, she saw George squeeze his bulk through its narrow diameter.
The vent pipes were cylindrical and of a narrow enough diameter that he was able to hold on to each one securely.
If the soil is plastic, this thread will retain its shape down to a very narrow diameter.
To be accurate, the lens itself is of a narrow diameter, giving a very small overall aperture.
The narrow internal diameter results in a much higher velocity than would occur inside conventional tubing or inside the casing.
They have a narrower diameter and are more elongated compared to sieve tube members.
On acceleration, for instance, the drive pulley will have a narrow diameter for more torque, like a low gear.
No longer content to simply drift, they were moving back and forth across the narrow diameter of the tunnel.
