pillar line

pillar line

[′pil·ər ‚līn]
(mining engineering)
Air currents which have definitely coursed through an inaccessible abandoned panel or area or which have ventilated a pillar line or a pillar area, regardless of the methane content, or absence of methane, in such air.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
According to sources at Hyundai India, the rear door design will be the same as the Grand i10 and the pillar line will start slim from the top of the door and thicken as it reaches the boot lid.
Hanna's Candles currently offers poured container candles and votives, and the company is creating a pillar line. The products are merchandised through POP displays, floor racks, and wing racks.