The Clem7 provides two lanes of traffic in each direction via parallel tubes.
It functions by having two parallel tubes both containing gas and heating coils.
The other, called, "shell and tube", contains several parallel tubes running from one end of the "shell" to the other.
The tunnel was constructed with two parallel immersed tubes with three lanes of traffic in each tube.
The right one held some kind of weapon: a series of short parallel tubes mounted above the wrist.
Because the Chunnel actually consists of three parallel tubes, two that carry trains and one that acts as a service tunnel.
When the fluid is flowing, it is led through two parallel tubes.
The two parallel tubes are counter-vibrating, to make the measuring device less sensitive to outside vibrations.
It takes the form of two parallel fluorescent tubes bridged at one end.
It looked like a flattened softball, grooved deeply for five Monk claws, with two parallel tubes poking out in my direction.
