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non-clogging
non-clogging adj. 
/(ˌ)nɒŋˈklɒɡɪŋ/,
Brit. /(ˌ)nɒnˈklɒɡɪŋ/
, /(ˌ)nɒnˈklɒɡɪŋ//(ˌ)nɒŋˈklɒɡɪŋ/U.S. /ˌnɑnˈklɑɡɪŋ/
/ˌnɑnˈklɑɡɪŋ/ΚΠ
1910 Daily Chron. 12 Mar. 8/5 A truly efficient non-clogging lubricant has been used.
1960 Farmer & Stockbreeder 16 Feb. 106/2 Automatic recoil-starter eliminating the use of loose starting rope; special non-clogging, fast-cutting blades.
1991 Public Wks. Oct. 96/3 (advt.) An advanced non-clogging orifice design and built-in underdrain insure fast, continuous dewatering.
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as lemmas