EPDM/EPM rɔba aduru anaa precompound-EPDM/EPM .
Ethylene propylene rɔba yɛ rɔba a wɔde ethylene ne propylene ayɛ sɛ monomer titiriw, sɛnea monomer no mu nneɛma soronko a ɛwɔ molecule nkɔnsɔnkɔnsɔn no mu no te no, ethylene propylene rɔba abien abien wɔ hɔ Kar nsɔano, srade a wɔde ka ho ne nneɛma afoforo.