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AE Lock alkyl sulfonyl chloride desulphurizing furnace double dare Doxergan electrochemical recording facsimile hob relieving grinding machine interconnecting device iodotannic acid Lffler's alkaline methylene blue stain longitudinal loading gear nagorny-karabakh patentably reserve for variations in actuarial assumption rivages Sfumato solid solution heat treatment sponge holding forceps step-granddaughter vertex symmetry