Starting from the end of the second world war, synthetic rubber developed more rapidly with more species. at this time there have been a dozen types of synthetic rubber with different characteristics, and counting.Before the second world war, only natural rubber are available. so can I be that for the purposes of Engineering (engineering) there is no other choice but to use natural rubber. In line with the natural rubber used for various purposes, then started to found kelemahan2 natural rubber that is causing scientists strive to create synthetic rubber types specific to replace natural rubber, among others
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