Barack Obama – Ballotpedia

Obama worked as an associate attorney with Davis, Miner, Barnhill & Galland from 1993 to 2002.

Wiktionary – Appendix:Dictionary of Mining, Mineral, and Related Terms/B/3 – Wiktionary

In granular aggregates with eucryptite in lithia pegmatites. Miners' term for a thin, unworkable coal seam occurring above or below a workable seam. A British coal miner's term for any fine-grained, well-laminated rock (such as shale, clay, or mudstone, but not sandstone) associated with coal.

A Writer's Blog – Uncategorized

The sand production line consists of hopper, jaw crusher, cone crusher, circular vibrating screen, vertical shaft impact crusher, sand washer, belt conveyor and other supporting equipment.

Chutes and tables – PatentStorm

6752274 Log washer with staggered paddles The log washer with staggered paddles is a device for washing and separating aggregates, such as sand, gravel, ores, etc.

Wiktionary – Appendix:Dictionary of Mining, Mineral, and Related Terms/T/5 – Wiktionary

Also called, according to its various uses, sizing trommel, washing drum, and washing trommel. Such a curve is independent of the coal being washed and is characteristic of a specific coal-washing device. The Tromp process was the first to introduce (about 1938) the use of magnetite suspension in dense-medium washing.

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