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By Bulley, Henry N N Merchant, James W; Marx, David B; Holz, John C; Holz, Aris A ABSTRACT: The U.S. Environmental Protection Agency is charged with establishing standards and criteria for assessing lake water quality.
Word of the Day
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.
The word 'pawl' probably comes from a Latin word meaning 'stake'.