Correct spelling for the English word "Strockle" is [stɹˈɒkə͡l], [stɹˈɒkəl], [s_t_ɹ_ˈɒ_k_əl] (IPA phonetic alphabet).
Among glassmakers, a tool like a shovel for emptying the chests of metal into the pots.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.