sealed tube

sealed tube

[′sēld ′tüb]
(electronics)
Electron tube which is hermetically sealed.
References in periodicals archive ?
Hyperloop is a futuristic surface transport system comprising a sealed tube through which a pod travels free of friction to achieve super high speeds (almost at the speed of sound) using magnetic levitation.
A hyperloop is a sealed tube or system of tubes where a pod can travel free of air resistance or friction.
The Hyperloop line would propel "pods" full of passengers on a Maglev track at hundreds of miles an hour through a sealed tube.
What is the purpose of enclosing the hyperloop in a sealed tube with little air?
propels tubes containing passengers along a sealed tube network using air
Rugged construction and sealed tube increase portability
I don't know whether John Volpe's idea of compressed air in a sealed tube would work.
The remaining chemicals were only partially soluble at both concentrations and their mixtures with the POE were kept well stirred before homogeneous representative samples were drawn for sealed tube preparation.
The scan engine, which can be held in the palm of the hand, includes a complete 3D ultrasound imaging machine and automated image processor within a small, sealed tube.
Devices known as sealed tube neutron generators do exist, in the form of metal tubes that require the use of an isotope of hydrogen named tritium.
For HPLC, four microliters were withdrawn from each sealed tube and injected into the reversed phase C18 column (5u, packing particle size, 300 mm length by 4.
The methodology is compliant with ISO 150705:2002, specifying a sealed tube method based on Standard Methods for the Examination of Water and Wastewater, 21st Edition, Section 5220 D.