"worked their arduous way up the mining valley"; "a grueling marketing campaign"; "hard labor"; "heavy do the job"; "heavy heading"; "put in numerous laborious hrs to the venture"; "established a punishing speed" in the armed forces or marketplace; working with (or staying) the heaviest and strongest armaments or weapons or https://dampers-for-industrial-se01233.anchor-blog.com/17366862/not-known-factual-statements-about-heavy-duty-stainless-steel-damper-manufacturers