... rubber, isoprene rubber the aftereffect of accelerator Use 4: used for rice, wheat, tobacco, sugar beet, grapes and so on many kinds ... rubber, isoprene rubber the aftereffect of accelerator Use 4: used for rice, wheat, tobacco, sugar beet, grapes and so on many kinds ... rubber, isoprene rubber the aftereffect of accelerator Use 4: used for rice, wheat, tobacco, sugar beet, grapes and so on many kinds ...