B PERFORMING OPERATIONS; TRANSPORTING
B29 WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
B29C SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
2791/00 Shaping characteristics in general
B29C2791/004 Shaping under special conditions
B29C2791/005 Using a particular environment, e.g. sterile fluids other than air