Experiments with metal shafts went through a number of phases. In 1924 the Union Hardware Firm of Torrington, Connecticut, U.S., drew a seamless shaft of high-carbon metal that might be heat-addressed and tempered. It had been authorised through the R&A in 1929 and considerably replaced hickory while in the early https://finnagnva.educationalimpactblog.com/51946721/top-guidelines-of-harrington-park-ear-specialists