annular

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annular

[′an·yə·lər]
(mining engineering)
The space between the casing and wall of a hole or between a drill pipe and casing.

annular

Said of a ring-shaped structure or object.
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These cyclic structures of amide groups propagated to the larger structure through nitrile oligomerization and dehydrogenation while the amide groups disappeared and the molecules annularly cross-linked (22), (23).
Polyacrylonitrile/acrylamide-based carbon fibers prepared using a solvent-free coagulation process: fiber properties and its structure evolution during stabilization and carbonization
The cooling air is delivered from 38 nozzles installed annularly on the side wall at a height of 14.
Discussion of design method and optimization on airflow distribution in a large-space building with stratified air-conditioning system
06 mm wide at opening, with spines annularly ranged (Fig.
Two South American new species of Neophyllaphis subgenus Chileaphis (Hemiptera: Aphididae)

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