This part of JB/T 7884 specifies the type, technical requirements, inspection methods, inspection rules, marking, packaging and storage of the shell ribs of sawtooth gins. This section applies to the ribs of the sawtooth gin machine (hereinafter referred to as the ribs of the shell).
JB/T 7884.4-2013 Referenced Document
GB/T 1804 General tolerances Tolerances for linear and angular dimensions without individual tolerance indications