heavy series screw — винт для гаечного ключа с широким зевом
endless tangent screw sextant — секстан с бесконечным винтом
cone point set screw — установочный винт с коническим концом
recessed screw head — головка винта с крестообразным шлицем
french head screw — винт с цилиндрической головкой и сферой
English-Russian big polytechnic dictionary. 2014.
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