ocr: A A B B AAlY O C O D C Figure 4. A: a rake pick; B: a ball pick; C. a double ball piek; D: a diamond pick. l E Figure 5. A: a hook pick; R: a pin and wafer Jock tension wrench; C:ae double-wafer tension wrench; D: a. Feather Touch tension wrench; E: a lomemade Fealher Touch tension wrench,
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