CPC Subgroup
B21G 1/08 of hollow needles or needles with hollow end, e.g. hypodermic needles, larding-needles (B21G1/10 takes precedence)
Full Title
Making needles used for performing operations (forming heads on pin-like needles B21G3/12; making U-shaped hairpins B21G7/04) > of hollow needles or needles with hollow end, e.g. hypodermic needles, larding-needles (B21G1/10 takes precedence)