32-pitch gear rack

English to French Tech/Engineering Other cutting torches

Equipped with an innovative, easy-to-remove **32-pitch gear rack**, the phenolic positioning tube easily adapts to any 1-3/8" torch holder. An ATC™ (Advanced Torch Connector) quick disconnect option makes it a simple task to convert from machine torch to hand torch and back again.

http://news.thomasnet.com/fullstory/22220/1106

Je ne vois pas très bien ce que 32-pitch gear rack signifie ici. Merci